Thanks for the clue (and would you care to mention just how you did find
number again?). Meanwhile, here's another item I came across this week,
since the topic comes up again . From May, 1902 "The Camera and Dark
Room":
HOW TO PRINT ON CROCKERY, LAMP-SHADES, CLOCK DIALS ETC.
Those who have never experimented in this direction are not aware of the
beautiful effects that can be obtained from printing favorite negatives
on earthenware, vases, lamp shades, gas globes etc. It is my purpose in
this brief sketch to give directions and formulas that if carefully
followed will enable one to do this work.
The easiest and cheapest method is to print direct from the negative....
Proceed as follows: first beat up sufficient quantity of the white of
eggs to cover the portion of the surface desired to print upon, then mix
the following solutions.
No. 1
Water - - - - 4 ozs
Red Prussiate of Potash - - .6 drams (that's point 6)
No. 2
Water - - - - 5 ozs
Citrate of Iron and Ammonia 7 1/2 drams
Now spread the white of egg evenly over the surface and when it has dried
thoroughly, sensitize with a solution made of equal parts of No. 1 and
No. 2. When this is dry the vase or whatever is being used is ready to
be printed upon. Place the film over the sensitized surface by using wax
at each corner to keep it in position. It may then be printed in strong
sunlight. There will be no need to remove the film to see how dark the
image is growing, because with the above formula, it will not print
beyond a certain depth. Print for about half an hour, which will be about
right. Then wash the vase for about fifteen minutes in clear water.
Better results may be obtained by using gelatine instead of the white of
eggs. ..... sensitizer:
water - - - 1 ounce
silver nitrate - - 50 grains
Print very deep and tone in a gold bath.
Any other article of this nature can be printed on in the same manner and
very beautiful effects obtained .....
The article goes on, but as we see it's gotten quite sketchy. The first
part, however, seems do-able. I note that it almost certainly used brown
scales of ferric ammonium citrate rather than our presently standard green
scales, which are supposedly "5 times faster." Whether the proportions of
1 and 2 would change, perhaps someone else can say.....
Judy