Hard work and determination paid off! I'm not familiar with this paper as I've always used acidified Stonehenge, and Hahnemuhle platinum rag (awesome paper!). Have you tried acidifying your paper?
I haven’t but it’s on the experimentation list. I have to research it first.
Andrew,Hard work and determination paid off! I'm not familiar with this paper as I've always used acidified Stonehenge, and Hahnemuhle platinum rag (awesome paper!). Have you tried acidifying your paper?
Andrew,
Have you done a direct comparison of Stonehenge with and without acidification?
If you have I'd be interested in the results.
I use Stonehenge Warm and Light as my standard cyanotype paper without pretreatment. I do, however, develop cyanotypes with 25% vinegar. I'm pretty satisfied with the results but always looking to get better!
Citric acid, vinegar, and my favourite, sulfamic acid 10%.
so just straight up white kitchen vinegar?
Yes, I did...years ago. Stonehenge is unusable unless acidified, at least in my experience. Non-acidified is anemic and spotty. I prefer the heavier papers like Arches Platine, or Hahnemuhle PR. If you do try Stonehenge, it is better to use a proper brush rather than sponge brush. The latter roughs up the paper's surface if you're not careful. For that reason, I do not use it anymore.
The differences in results/experiences when doing alt processes never cease to amaze me.
I use both Stonehenge Light and the heavier Stonehenge Warm for cyanotypes routinely and with very nice results. I have never pretreated either paper with acid.
I develop my cyanotypes using 25% vinegar (i.e. 250 mL white vinegar + 750 mL water) rather than just with water.
I wonder if that might be the difference in our experience with these papers.
With regard to brushes, I totally agree ... foam sponge brushes are to be avoided for coating paper.
The differences in results/experiences when doing alt processes never cease to amaze me.
From what I understood, it is the new ware cyanotype that benefits from pre-acification, not so much the classic. Does Andrew do the new cyanotype?
I could be wrong though.
Good job, and it looks like you are having fun!
There is a long thread here about sulfamic acid that you can probably find and read through. I'll put in my 2 cents... I found that on some papers it can affect the surface sizing ( in fact, my memory is that it might have been Andrew that got me to try a weaker 2% solution... which lessened the problem but didn't completely solve it). With cyanotype, if you want the solution to sink into the paper, this might not be a problem, but with some processes it's better to keep things up closer to the surface of the paper, away from internal sizing and where washing can be more effective. In any case, if you feel the surface of the paper before and after acidification, you might notice a difference -- I'm sure it depends a lot on the paper and I've never used the Canson XL bristol. Also, some thin papers will have less wet strength after acidification.
That was just my experience with my equipment. Not all printers will react the same way. That's the problem with following the advice of others when it comes to alt. processes. Their advice can be useful for giving you ideas and inspiration, but to really know what works best for you, your equipment, and your style, you just have to try it out for yourself. It's a lot less rigid of discipline than silver gelatin. And that's why keeping your own notes and strict controls are so important.
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