|From:||"George Cole" |
Gray’s Formulary contains a reliable cleaning procedure for slides:
40 parts saturated aqueous potassium dichromate
Add, with due precautions, 60 parts sulfuric acid.
I always just put excess dichromate in 60 parts water so that much solid dichromate remained in the bottom of a coverable
Add the 60 parts of Sulfuric Acid, with care.
The quantity of cleaner may be a gallon or so, mixed in a container kept for that purpose.
Put the coplin jars or other glass ware in the mixture for a few minutes or over night. Rinse the glass well with deionized water.
This mixture can be used for a long time. But the best procedure is when the solid dichromate is gone, a fresh batch is mixed.