Quote Originally Posted by Harold33 View Post
So my question would be:
reducing Sulfite by 25% in A (to 75 gr.), how to ajust the proportion of metol in order to maintain the same level of activity than with 100gr. of Sulfite ? Increase metol ? add a pinch of Borax ? something else ?
while you decrease sulfite or increase metol - you decrease pH of bath A and result activity decreased. so you need keep pH while decreasing amount of sulfite. buy cheap pH meter, decrease amount of sulfite to 40-50g/l and add some alkali like sodium carbonate to keep pH