Kallitype
Kallitype
a chemical process similar to the Van Dyke Brown based on the use of a combination of ferric and silver salts. Three developing solutions used to give a different image color. Kallitype images generally have a richer tonal range than the cyanotype. These prints were popular in the 19th century, and then their popularity faded away.
Darkroom Technique
chemical solutions required
sensitizer:
Ferric oxalate (50g)
Oxalic acid (3g)
Silver Nitrate (25g)
add distilled water to make 300 mL
Developers:
Sepia tones-rochelle salt (45g), potassium dichromate (1.5g), add distilled water to make 950 mL
Blue-black tones-Borax (24g), Rochelle Salt (90g), Potassium dichromate (1.5g), add distilled water to make 950 mL
Neutral-black tones-Borax (90g), Rochelle salt (68g), Potassium dichromate (1.2g)
add distilled water to make 950 ml
Fixer:
sodium thiosulfate(hypo) (50g), Ammonia (.88) (12mL)
add distilled water to make 1 liter
Procedure
step 1: spray paper with household starch, allow paper to dry
step 2: prepare sensitizer solution
step 3: apply sensistizer using cross-hatched strokes, dry paper in darkness
step 4: expose image until tone look correct
step 5: place paper in developer, do not overdevelop
step 6: wash for 2 minutes, then fix in special fixer, then treat in hypo solution, allow to dry