We make both powders and liquids under this brand. please keep in mind that the powder fixers are sodium thio products and are not as fast as the liquids which are ammonium thio. The liquid Odorless Fixer is close to saturation with sulfite and will. over time, drop some sulfite out of solution. This does not affect the strength or the true advantage of NO ODOR. Our print developers (P20, P90, & Ultra Cold Tone) will all develop all papers to their maximum density. Keeping in mind that the human eye can not differentiate paper densities above 1.85; the real advantage of these developers is the slight tonal difference presented by them and the great mid tone range that they offer. Our lab customers like them because they can be used in both manual and machine applications giving the same or similar results in each case. All of our developers are phenidone /Q.