borax glass
vitreous anhydrous sodium tetraborate (Na2B4O7).
borosilicate crown glass
an optical crown glass containing substantial quantities of silica and boric oxide.
-Borax - mild alkali used in fine grain developing solutions to speed up the action of the solution.
-Boric acid - compound used in certain fixers to prolong shier hardening life.
BORAX-Sodium tetraborate, Na2B4O710H2O; a mild alkali used as an accelerator in photographic developers, particularly for fine-grain effects. BRIGHTNESS RANGE-Variation of light intensities from maximum to minimum.
Borates, such as borax (sodium tetraborate), boric acid and sodium metaborate, are toxic to plants, even at a concentration of 100 ppm. Many film developers and fixers contain 1 to 20 g/L of these compounds at working strength.
Borax is recommended for the finest grain and lowest contrast, Sodium Metaborate for increased contrast accompanied with increased grain, and Sodium Carbonate for the highest contrast but with the greatest grain.
5% solution of borax, and a 28% solution of acetic acid. Where Kodak processing solutions are specified, substitutions are possible; thus almost any normal black- and- white print developer can be used instead of Dektol.
Accelerants are an akali, commonly sodium or potassium hydroxide, sodium carbonate, kodalk, or borax. Yes, that is the same stuff in the box at the grocery with that twenty-mule team on it.
A chemical ingredient of film or paper developers that's often referred to as an activator and speeds up the developing agents. It's usally an alkali such as sodium carbonate, borax or sodium hydroxide.
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a little of the Sodium Sulphite, to stop the Metol oxidising when you mix it, then gradually add the Metol , stirring until it is all dissolved. Add the Sodium Sulphite, again stirring until dissolved then do the same with the Hydroquinone and Borax.
Exposure is by contact printing, but, because of the relatively high sensitivity of the medium to light, you should work in dim conditions, and give an exposure of around 1 minute in sunlight. Develop the image in a 1% borax solution, ...
 See also: Image, Photograph, Light, Processing, Film
  
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