HYDROQUIONE

[Bruce Osgood]

I'm about to replenish my supply of Hydroquione purchased from Photographers Formulatry. To purchase it locally I can shop at Adorama but they list Photographers Formulary Hydroquione as Residual Hydroquione. I cannot find Residual Hydroquione at the Photographers Formulary site and wonder if I may be getting something I need to adjust my formulae for?

What is the difference between Residual Hydroquione and Hydroquione?

Are adjustments in usage necessary?

Any idea which way? How much?

 

[Jorge Oliveira]

Honest, it's the first time I've heard about residual hydroquinone - in 33 yrs.

Jorge O

 

[Silverpixels5]

Its the first I've hear of it as well. Perhaps its a process term in the way its made. There may be a way that they process hydorquinone directly and another way in which it is a by-product of a different reaction, and thereby gets the term 'residual'. Just speculation though....

 

[Bruce Osgood]

Well, I went into Adorama and searched Hi and Low for "Residual" Hydroquione and could only find Hydroquione.

I had a printout of their web page showing "Residual" and the clerk said "I have no idea what residual hydroquione is. We only sell plain hydroquione."

Okay, back to the real world.