I've been experimenting with cyanotypes. I am pleased how light-sensitive they >are - even on a very heavily-overcast day with no direct light, I've been able >to get very rapid results.
Naturally right now, I have an inverted (i.e. negative) image open in Preview, >with a sheet of paper coated in the solution pressed against it, under a sheet >of glass.
Just maybe, there will be enough UV from the display to expose an image. No >sign of any reaction at all after 30 minutes, and quite possibly there won't >be enough to produce any reaction.
In article <[email protected]>,
D.M. Procida <[email protected]> wrote:
I've been experimenting with cyanotypes. I am pleased how light-sensitive they
are - even on a very heavily-overcast day with no direct light, I've been able
to get very rapid results.
Naturally right now, I have an inverted (i.e. negative) image open in Preview,
with a sheet of paper coated in the solution pressed against it, under a sheet
of glass.
Just maybe, there will be enough UV from the display to expose an image. No >> sign of any reaction at all after 30 minutes, and quite possibly there won't >> be enough to produce any reaction.
Interesting! I think the UV from both LED-backlit LCD displays and OLED displays
is negligible, so I doubt it will work.
On 16 Nov 2024 at 20:32:01 GMT, "Richard Tobin" <Richard Tobin> wrote:
In article <[email protected]>,
D.M. Procida <[email protected]> wrote:
I've been experimenting with cyanotypes. I am pleased how
light-sensitive they are - even on a very heavily-overcast day with no
direct light, I've been able to get very rapid results.
Naturally right now, I have an inverted (i.e. negative) image open in
Preview, with a sheet of paper coated in the solution pressed against
it, under a sheet of glass.
Just maybe, there will be enough UV from the display to expose an
image. No sign of any reaction at all after 30 minutes, and quite
possibly there won't be enough to produce any reaction.
Interesting! I think the UV from both LED-backlit LCD displays and OLED displays
is negligible, so I doubt it will work.
So far the results have been quite disappointing. I suppose I should be glad not to be spending most of my days with my face in front of a UV light source.
I have an ancient 5" B&W video monitor in the garage... do you suppose that will put out significantly more UV?
In article <[email protected]>,
D.M. Procida <[email protected]> wrote:
I've been experimenting with cyanotypes. I am pleased how light-sensitive they
are - even on a very heavily-overcast day with no direct light, I've been able
to get very rapid results.
Naturally right now, I have an inverted (i.e. negative) image open in Preview,
with a sheet of paper coated in the solution pressed against it, under a sheet
of glass.
Interesting! I think the UV from both LED-backlit LCD displays and OLED displays
is negligible, so I doubt it will work.
On 16 Nov 2024 at 20:32:01 GMT, "Richard Tobin" <Richard Tobin> wrote:
In article <[email protected]>,
D.M. Procida <[email protected]> wrote:
I've been experimenting with cyanotypes. I am pleased how light-sensitive they
are - even on a very heavily-overcast day with no direct light, I've been able
to get very rapid results.
Naturally right now, I have an inverted (i.e. negative) image open in Preview,
with a sheet of paper coated in the solution pressed against it, under a sheet
of glass.
Interesting! I think the UV from both LED-backlit LCD displays and OLED
displays
is negligible, so I doubt it will work.
A result, of sorts.
https://www.dropbox.com/scl/fi/59xz6lz38jtm6lkfo2vpj/cyanotype.jpg?rlkey=w8ptyb9wqors7dkdio8ag8qf1&dl=0
That took about three hours. The blues are pretty feeble. When I washed it, the paper failed to keep the image - that could be because of the paper though, I was just doing a test on some scrap paper.
I should try with a mirror pressing the sheet to the screen, to reflect back any extra light.
| Sysop: | Keyop |
|---|---|
| Location: | Huddersfield, West Yorkshire, UK |
| Users: | 715 |
| Nodes: | 16 (3 / 13) |
| Uptime: | 28:33:32 |
| Calls: | 12,107 |
| Calls today: | 7 |
| Files: | 15,006 |
| Messages: | 6,518,234 |
