bichromate
dichromate

Except for gum bichromate, all traditional processes are represented.

The third, a faint, yellow gum bichromate print, turns her into a ghost.

Most of the tricks in the photography trade are represented, including multiple exposures, hand-tinting and the gum bichromate process.

He typically used sepia platinotype and gum bichromate printing processes.

The bichromate is decomposed using ammonia.

He mainly used the gum bichromate technique, applied in several layers, and thus allowing for previously unseen color tonalities.

Oil print: Made by applying greasy inks to paper coated with a solution of gum bichromate and gelatin.

Bichromate of potash, iron salts, ammonia and caustic soda are chemicals most often used to color wood.

The pictures are printed using the gum bichromate process, in colors ranging from dusty blue to bright orange and burnt sienna.

Gum bichromate is a 19th-century photographic printing process based on the light sensitivity of dichromates.

In this process a regular silver gelatin print is made, then bleached in a solution of potassium bichromate.

Use a proprietary bleach to lighten the wood, bichromate of potash or ammonia to darken hardwoods.

In 1900, she married James Cones, also a photographer, who assisted her with darkroom work, frequently using the gum bichromate printing process.

The photograph has a romantic "pictorial" tone, thanks in part to the gum bichromate method of printing, which allowed for a kind of painterly fuzziness.

It is composed of a Bunsen pile, which I do not work with bichromate of potash, but with sodium.

A 19th-century gum bichromate process allows Scott McMahon to produce surreal painterly photographs.

The stains and imperfections of prints made from gum bichromate or albumen coatings would have been cropped out by a 19th-century photographer.

She had a strong interest in printing techniques that could be manipulated by the photographer, including ozotype, gum bichromate and platinum printing.

He was familiar with various photography techniques of the time including gum bichromate, platinum print, bromoil process and autochrome.

She then applied 20 or so layers of gum bichromate, two chemicals mixed with watercolor pigment to form a photographic emulsion that is bound to the paper.

Some of the photos are the original gum bichromate prints that Platt made from 8-by-10-inch glass negatives and then painted over to increase their impressionistic effect.

Echagüe remained faithful throughout his life to the aesthetics and techniques of pictorialism, including using gum bichromate and coal.

In 1894 he began to use the gum bichromate printing process recently introduced by A. Rouillé-Ladevèze at the Paris Salon.

Carbon print: This is an extremely delicate print made by coating tissue paper with potassium bichromate, carbon black or another pigment and gelatin.

One of the intentions of the experiment was to try a variety of printing techniques and papers, including platinum, gelatin silver and gum bichromate prints.

The higher the proportion of dichromate, the more sensitive the mixture.

The one you wrote was the equilibrium between chromate and dichromate.

The right concentration of dichromate is always a compromise between speed and contrast.

Use only one of the three kinds of dichromate crystals.

Potassium dichromate is a brilliant orange for the opposite reason.

However, increasing the concentration of dichromate also reduces the contrast which is very low at best.

It is made by reducing potassium dichromate with sulfur dioxide.

Part B is a saturated solution of dichromate salt.

The net reaction is that the dichromate oxidizes the iron.

When the dichromate is all reduced, the reaction stops.

I was wondering if you could tell me where to find materials like; clay, ammonium and dichromate.

Not all of the ammonium dichromate decomposes in this reaction.

The plate is developed by carefully washing out the dichromate salt and dried without heat.

The chromate is converted by sulfuric acid into the dichromate.

Mix the dichromate crystals with the 80mL of warm water until dissolved.

Accuracy can be improved by calibrating the dichromate solution against a blank.

Cover paper in cold water face down until orange dichromate and gum pigment diffuses out.

Potassium dichromate is a strong oxidizing agent under acidic conditions.

The reaction of potassium dichromate with organic compounds is given by:

Therefore potassium dichromate cannot be used as mordant effectively.

In sealed containers, ammonium dichromate is likely to explode if heated.

It can be destroyed by sodium dichromate.

This is coated with a dilute solution of potassium dichromate and dried in low light conditions.

During this time the sunlight and potassium dichromate tan the gelatine exposed to light.

A mixture of potassium dichromate and dilute sulfuric acid can also be used.