Search Results: "lus"

A borderless frame set on a table outdoors, with two sheets of paper a vertical half of which is covered by black paper, while the other half has lines with an ink name and a small filled rectangle, all in the ink itself.

Note

This post will be updated in the next weeks with the test results as they become available.

Note

Most of the images in this post have no real alt-text: they are all scans of the test sheet at various stages through the test, and the results visible on them are described in detail at the end of the post.

Most of the time, what people write by hand will either end up inside a notebook in a drawer or cupboard where it s well protected, or thrown in the recycling where it doesn t matter. There are times, however, when things will be exposed to light: it doesn t matter whether it s a work of artistic calligraphy that you want to frame or a passive-aggressive notice left in the atrium of a building; it is useful to know whether the work will remain legible or it will fade into nothing in a short time. A few inks are tested by the producers for lightfastness according to some established standard, a few others are declared lightfast in a generic way, but a lot come with no indication at all. Proper testing according to the standard scales requires significant equipment to precisely control the exposure, but it s significantly easier and fun to do a simple test to divide the inks into three categories:

suitable for framed calligraphy, i.e. it looks the same after 3 months of direct sun exposure;
suitable for complaining about the way your neighbours deal with the trash, i.e. still readable after 3 months of exposure;
not suitable for either, i.e. has faded significantly in the same time.

In the past I ve done some such tests by taping some sheets to a south-east facing window, and I ve noticed that most of the results were already apparent after a month, and there was basically no difference between two and three months of exposure, but spring equinox to summer solstice is a nice timeframe to use for such a test (and it leaves time for a second test of different materials from summer solstice to autumn equinox), so this is what I ve chosen to do this year. Rather than a window, now I have access to a south-facing covered balcony that is protected from rain but receives quite a bit of direct sun, so instead of taping sheets to the windows¹ I ve prepared a sturdy cardboard panel that I can leave on a table on the balcony, hopefully safe from the rain, but well exposed to the sun. And then made a quick test, and realized that without the window glass in front, the black strip used to cover the unexposed half of the sample doesn t lay flat and lets some sun in, so I used an old cheap² glass frame instead of the panel. The contents of an order from a fountain pen shop, spread out on a table: a couple of cheap pens, a couple bottles of ink, a converter, a small ritter sport chocolate and a bag full of 5 ml vials with 2 ml of ink each, and a thank-you note from the seller (Steffi).

The contents of an order from a fountain pen shop, spread out on a table: a couple of cheap pens, a couple bottles of ink, a converter, a small ritter sport chocolate and a bag full of 5 ml vials with 2 ml of ink each, and a thank-you note from the seller (Steffi).

The next step, already in January, was mentioning in a fountain-pen enthusiasts forum that I planned such a test, and asking if people were interested in having me buy a few samples of more inks when I was buying my next pen. The word enthusiasts is probably a hint of the reason why soon afterwards I received a package with the pen I had planned to buy, its converter, and a couple dozens ink samples. And then a couple envelopes with additional samples of inks that weren t available on the shops, from said enthusiasts. Added to the inks I already had acquired since the last lightfastness test, it meant that they couldn t all fit in one single page, and thus I had some room to add some inks I had already tested: some were requests, and for others I tried to select ones that felt relevant. Since I m changing the test setup, I ve decided I should probably keep doing this until I ve tested again all of the inks I still have available. see below

For the paper, I ve used A4 sheets of Clairefontaine Dessin Croquis 160 g/m , one of my staples that I m sure I will have available in the next years, printed with a dot pattern with a laser printer, using this pdf. And as for the pen I ve used a fresh Brause n 361 nib: loading a fountain pen with all of these inks wouldn t be a reasonable effort, and the 361 is one of the writing implements I use most anyway. I also used a glass pen to fill a couple of squares on the paper with more ink. One side of each sheet was then covered with a strip of 300 g/m black paper (also from Clairefontaine), kept in place with three dots of non-permanent two sided tape, put in the frame and set out in the sun on the morning of 2026-03-20, the day of the spring equinox.

While I was filling the sheet for the lightfastness tests, I decided to also prepare a second set of sheet, for a liquid resistance drop test. On each line, beside the name of the ink, I added five sets of crossing parallel lines, and let everything dry for a few days. Then I used a syringe to put a drop of a liquid on each set of lines, waited for it to be absorbed into the paper and to dry, at least overnight, but sometimes also for a day or two (life happened), and then looked at the results and did the next test. The first liquid was water, with the usual wild difference between washable and permanent inks, and all of the intermediate possibilities. The second liquid was isopropyl alcohol, and I was surprised to see that, with very few exceptions, most inks didn t change at all. I wonder whether that s related to the fact that instead of forming a drop it was absorbed almost immediately into the paper, and dried in a very short time. The third liquid was hydrogen peroxide: beside the individual results I noticed that its column yellowed visibly; I wonder whether that means that the paper I used has optical brighteners, and it will also yellow under the sun: that wouldn t be ideal, but it would also be a surprise, for paper that is acid free and sold for arts. The fourth liquid was citric acid, by mixing a bit less than a teaspoon of citric acid granules in just enough very warm water (heated to 70 C, i.e. the lowest temperature available on my kettle) to dissolve most of the acid. I forgot that I had some old PH strips until one hour after I ve put the drop on the paper, and I don t know whether something had changed, but when I did remember about them it showed a deep red between 1 and 2. I don t think I can trust those strips too much, however. This backfired badly: the drop of citric acid never dried out, but formed a sticky paste that prevented me from scanning the results, and I m not sure whether I ll do the last test, which was supposed to be household bleach. see below

Luckily I had scanned the partial results, and they are shown here.

After one full day with plenty of sun, nothing really had changed, except possibly for a vague hint that the Herbin Bleu Myosotis may have have been a bit lighter than it started, but it may also have been a suggestion.

After three days, however, some results started to show, with the most fugitive inks starting to be visibly changed, becoming either paler or in some case duller.

And the full week showed more of that, with a few more inks starting to show visible change.

After two weeks the paper had significantly yellowed, something I did not expect from drawing paper (and which means that I will probably use a different paper when making similar tests in the future). As for the inks, there were a couple more inks with visible changes, but mostly it was more of the same as seen in the previous week.

Three weeks started to show changes in the black and most irongall inks, and of course more changes in the even less resistant inks.

Week four saw a bit more clouds and rain than the first few weeks, and there weren t big changes, but mostly more of what had already started to happen earlier.

A month didn t change much compared to the four weeks, but I did the scans for completeness, and from now on I m going to update monthly.

These are the inks I ve tested, and here I ll add notes on the results, as soon as they will be available, keeping this section updated. When nothing is mentioned, it means that there were no changes, either under the light or under the various liquids.

Lamy Sepia: Not resistant to water, the drop becomes an uniform colour spot. After one week it started to be just slightly paler, more so after three weeks.
Sheaffer Skrip Red: Not resistant to water, the drop becomes an uniform colour spot. After one week it started to be just slightly paler, more so after three weeks.
Waterman Audacious Red: Not resistant to water, the drop becomes an uniform colour spot. After three days it started to be just slightly paler, after a week visibly so. After four weeks it was very pale.
Waterman Harmonious Green: Not resistant to water, the drop becomes an uniform colour spot; the hydrogen peroxide drop looks a bit lighter than the one with just water. After one week it started to be just slightly paler, more so after three weeks. After four weeks it was very pale.
Waterman Mysterious Blue: Not resistant to water, the drop becomes an uniform colour spot; the hydrogen peroxide drop is significantly lighter and tends towards green. After two weeks it started to be just slightly paler, after three weeks it was more gray. After four weeks it was very pale.
Waterman Serenity Blue: Not resistant to water, the drop becomes an uniform colour spot; the hydrogen peroxide drop is almost completely bleached to a light yellow. After one week it started to be a bit duller. After four weeks it was paler and duller.
Visconti Blue: Not resistant to water, the drop becomes an uniform colour spot. After one week it was visibly duller, looking darker than the original. After three weeks it was duller, and lighter. After a month it was just a pale gray.
Montblanc Royal Blue: Not resistant to water, the drop becomes an uniform colour spot; the hydrogen peroxide drop is almost completely bleached to a light yellow. After one week it started to be just slightly duller, more so after two weeks. After three weeks it was also paler. After a month it was just a pale gray.
Montblanc Mystery Black: Not resistant to water, the drop becomes an uniform colour spot. After three weeks it started to be a bit paler.
Aurora Nero: Not resistant to water, the drop becomes an uniform colour spot. After three weeks it started to be a bit more brown.
Online Duft Blueberry: Not resistant to water, the drop looks very washed out, although a hint of the original shape can be guessed; the hydrogen peroxide drop is almost completely bleached to a light yellow. After one week it was visibly paler and duller. After three weeks significantly so. After a month it was a pale grey.
Diamine Forever Ink - Smoky Mauve: After a month it looked a bit more purple.
Diamine Forever Ink - Honey Pot: .
Diamine Forever Ink - Coral Blaze: .
Diamine Forever Ink - Red Ochre: .
Diamine Graphite: Not resistant to water, the drop becomes an uniform colour spot.
Diamine Rustic Brown: Not resistant to water, the drop becomes an uniform colour spot. After three weeks it started to be very slightely paler.
Diamine China Blue: Not resistant to water, the drop becomes an uniform colour spot; the hydrogen peroxide drop is almost completely bleached to a light yellow. After three weeks it started to be paler and duller.
Diamine Inkvent Purple Edition - Glacier: Not resistant to water, there is a drop of uniform colour, but it maintains a somewhat recognisable shade of the original shape. After three weeks it started to be lighter.
Fountainfeder STEVE: Not resistant to water, there is a drop of uniform colour, but it maintains a somewhat recognisable shade of the original shape. After two weeks the base colour had changed to a pink rather than purple.
Pilot Iroshizuku Syo Ro: Not resistant to water, there is a drop of uniform colour, but it maintains a somewhat recognisable shade of the original shape. After four weeks it was very slightely paler.
Pilot Iroshizuku Shin-Kai: Not resistant to water, there is a drop of uniform colour, but it maintains a somewhat recognisable shade of the original shape. After two weeks it had become lighter and more purple. After four weeks it was a purple gray.
Rohrer & Klingner IG Ebony: Not resistant to water, there is a drop of uniform colour, but it maintains a recognisable shade of the original shape; under hydrogen peroxide the shade is significantly lighter. After four weeks it was a bit lighter
KWZ IG Orange: Not resistant to water, the drop becomes an uniform colour spot; the hydrogen peroxide drop is significantly bleached to a light orange.
Kallipos.de Schwarze Eisengallus-Tinte: Water stains the paper, leaving however the original shape quite visible; is it almost completely bleached by hydrogen peroxide. After three weeks it started to be very slightely lighter.
Kallipos.de Blaue Eisengallus-Tinte: Water stains the paper, leaving however the original shape quite visible; is it almost completely bleached by hydrogen peroxide. After two weeks it had started to become lighter and more gray.
Rohrer & Klingner IG Salix: Water stains the paper, leaving however the original shape quite visible; is it almost completely bleached by hydrogen peroxide. After two weeks it had become lighter and significantly more gray. After a month it was a yellowish gray.
Rohrer & Klingner IG Scabiosa: Water stains the paper with a significant purple spot, leaving however the original shape quite visible; is is a bit bleached by hydrogen peroxide, but still quite readable.
Pelikan Edelstein Tanzanite: Not resistant to water, the drop becomes an uniform colour spot, but there is a visible trace of the original shape. After three weeks it started to be slightly paler.
Montblanc Burgundy Red: Not resistant to water, the drop becomes an uniform colour spot, with just a hint of the original shape; slightly bleached by hydrogen peroxide. After three weeks it started to be paler.
Cifra inchiostro finissimo verde alla lavanda: Not resistant to water, the drop becomes an uniform colour spot; quite bleached to a light yellowish green by hydrogen peroxide. After one week it was visibly paler. After a month it was a still readable pale trace.
Sennelier Abstract acrylic ink 917 purple: .
The Feather Pen Ink: .
Eloquentia Inchiostro nero: .
DeAtramentis Document Blue: .
DeAtramentis Document BlueGrey: .
DeAtramentis Document Brown: .
DeAtramentis Document Fuchsia: .
DeAtramentis Document Grau: .
DeAtramentis Document Green Grey: .
DeAtramentis Document Light Grey: .
DeAtramentis Document Moosgr n: .
DeAtramentis Document Orange: .
DeAtramentis Document Purpurviolett: .
DeAtramentis Document Urban Sienna: .
KWZ Sheen Machine: Not resistant to water, the drop becomes an uniform colour spot; the hydrogen peroxide bleached away the red sheen. This was one of the only two inks to react to isopropyl alcohol, which caused a pale cyan halo around the lines. After three days it was still perfectly readable, but had visibly lost some red sheen, after one week the red had completely gone and it looked very dark blue (but still shiny)
KWZ Walk over Vistula: Not resistant to water, the drop becomes an uniform colour spot. After four weeks it looked a bit darker and duller.
KWZ Warsaw Dreaming: Not resistant to water, the drop becomes an uniform colour spot. After a month it started to be a bit lighter.
Octopus Neon Violett: Water very lightly stains the paper, leaving however the original shape quite visible. The other ink that reacted to isopropyl alcohol, with a pale purple halo around the lines. After two weeks it was paler, more pink.
Octopus Write & Draw Elephant Black: .
Platinum blue black: Water stains the paper, leaving however the original shape quite visible; it is significantly bleached by hydrogen peroxide. After three weeks it started to become gray.
Pelikan 4001 Brillant-Schwarz: Not resistant to water, the drop becomes an uniform colour spot. After three weeks it was a bit more brown than black, after a month noticeably so.
Pelikan 4001 Blau-Schwarz: Water stains the paper, leaving however the original shape quite visible; it is significantly bleached by hydrogen peroxide. After three weeks it started to become gray.
Pelikan 4001 K nigsblau: Not resistant to water, the drop becomes an uniform colour spot, with just a hint of the original shape; significantly bleached by hydrogen peroxide. After three days it had started to be slightly paler. After three weeks it was significantly desaturated.
Herbin Bleu Myosotis: Not resistant to water, the drop becomes an uniform pink spot, significantly bleached by hydrogen peroxide. After three days it was already visibly paler, after one week it was a pale grey. After a month it was still somehow readable, but as a trace.
Faber Castell Royal Blue: Not resistant to water, the drop becomes an uniform colour spot, with just a hint of the original shape; significantly bleached by hydrogen peroxide. After three days it was slightly duller, after two weeks definitely so. After a month it was also quite paler.
Koh-I-Noor Fountain pen ink blue: Not resistant to water, the drop becomes an uniform colour spot, with just a hint of the original shape; significantly bleached by hydrogen peroxide. After three days it had started to be slightly paler, more so after one week when it had also turned grey. After four weeks it was very pale.
Koh-I-Noor Document Ink Blue: .
Koh-I-Noor Document Ink Black: Water leaves a very light stain, but the original shape doesn t look changed.
DeAtramentis Document Black: .
Waterman Intense Black: Not resistant to water, the drop becomes an uniform colour spot, with a trace of the original shape still visible; very lightly bleached by hydrogen peroxide. After three weeks it started to look a bit more brown, noticeably so after a month.
Herbin Perle Noir: Not resistant to water, the drop becomes an uniform colour spot, with a trace of the original shape still visible. After three weeks it started to look a bit more brown, noticeably so after a month.
Parker Quink black: Not resistant to water, the drop becomes an uniform colour spot.
Platinum Carbon black: .
Rohrer & Klingner Documentus Black: .
Sailor Pigment Kiwaguro: .
Platinum Dyestuff Red: Not resistant to water, the drop becomes an uniform colour spot; very lightly bleached by hydrogen peroxide. After three weeks it was a bit paler.
Noodler s Eternal Polar Blue: .

which would be spend the day covered by mostly closed shutters anyway, because they receive quite a bit of direct sun, and we don t want that to enter the house during the summer.
and thus, I hope, not especially UV-filtering.

Did you know you can just download people s SSH pubkeys from github from https://github.com/<username>.keys? Now you do
Yes it is somewhat confusing that the keygen command does things other than generate keys
This is more difficult than it sounds
And if you don t, by implementing this you now have infrastructure for issuing SSH certificates and can use that for SSH authentication as well.

Publisher:	Orbit
Copyright:	October 2010
Printing:	May 2011
ISBN:	0-316-12341-2
Format:	Trade paperback
Pages:	627

Publisher:	Ace
Copyright:	November 2024
ISBN:	0-593-81590-4
Format:	Kindle
Pages:	324

Series:	Sector General #7
Publisher:	Orb
Copyright:	1987
Printing:	May 2003
ISBN:	0-7653-0663-8
Format:	Trade paperback
Pages:	252

Publisher:	UpLit Press
Copyright:	February 2026
ISBN:	1-917849-15-X
Format:	Kindle
Pages:	423

Series:	Magic of the Lost #3
Publisher:	Orbit
Copyright:	September 2025
ISBN:	0-316-54286-5
Format:	Kindle
Pages:	575

Search Results: "lus"

4 May 2026

23 April 2026

VersioningAs I modified the script I found interesting to use CalVer-based versioning (the version variable has the format YYYY.mm.dd-r#) so I added a subcommand to show its value or bump it using the current date and computing the right revision number.

22 April 2026

21 April 2026

20 April 2026

14 April 2026

12 April 2026

1 April 2026

Web This one s trivial. I m not really hosting much of a website right now, but what there is is served via Apache with a Let s Encrypt certificate. Nothing interesting at all here, other than the proxying that s going to be relevant later.

Blog My blog is largely static content generated by Hugo. Comments are Remark42 running in a Docker container. If you don t want to handle even that level of dynamic content you can use a third party comment provider like Disqus.

Backups I m using borgmatic, backing up to a local Synology NAS and also to my parents home (where I have another HP EliteDesk set up with an equivalent OVH IPv4 fronting setup). At some point I ll check that I m actually able to restore them.

31 March 2026

30 March 2026

Final Steps I think the reset sequences from pgloader should take care of this, but just in case: mailman-web sqlsequencereset hyperkitty mailman_django auth mailman-web dbshell And, just to ensure postgres is optimized, run this in the psql shell: ANALYZE VERBOSE;

29 March 2026

28 March 2026

21 March 2026

19 March 2026

16 March 2026

Changes in version 0.1.4 (2026-03-16) Continuous integration has been updated several times DESCRIPTION now uses Authors@R Static linking is enforced, RcppClassic (>= 0.9.14) required Calls to Rf_error() have been replaced with Rcpp::stop() Updated versioned dependencies

VersioningAs I modified the script I found interesting to use CalVer-based versioning (the version variable has the format `YYYY.mm.dd-r#`) so I added a subcommand to show its value or bump it using the current date and computing the right revision number.

Final Steps I think the `reset sequences` from `pgloader` should take care of this, but just in case:
`mailman-web sqlsequencereset hyperkitty mailman_django auth mailman-web dbshell`
And, just to ensure postgres is optimized, run this in the psql shell:
`ANALYZE VERBOSE;`

Changes in version 0.1.4 (2026-03-16)

Continuous integration has been updated several times

DESCRIPTION now uses Authors@R

Static linking is enforced, RcppClassic (>= 0.9.14) required

Calls to `Rf_error()` have been replaced with `Rcpp::stop()`

Updated versioned dependencies