tol and hydroquinone, a preservative such as a sulfite, an accelerator comprising alkalis such as sodium hydroxide, sodium carbonate, potassium carbonate andthe like, an inorganic or organic inhibitor such as potassium bromide, 2-methylbenzimidazole, methylbenzothiazole and the like, a water softener such as polyphosphate, a surface over development inhibitor comprising a trace amount of iodide an