I just ordered this paper to experiment with. What does this product description mean?
FOMABROM VARIANT IV 123 is manufactured using a heavy spar loaded paper
base material (unprepared photographic paper).
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I just ordered this paper to experiment with. What does this product description mean?
FOMABROM VARIANT IV 123 is manufactured using a heavy spar loaded paper
base material (unprepared photographic paper).
Sorry, a Google search got results.. Here is what I found.
It is calc-spar, in a setting of heavy-spar or sulphate of baryta. 1885 Encycl. Brit. XIX. 86/2 Baryta White..is prepared by grinding to a fine powder the pure white native sulphate of baryta (heavy spar).
Baryta fills in paper for opacity and aids in maintaining paper flatness.
Unprepared photographic paper implies un-sensitized paper; but must relate to the application of the baryta.
Baryta is sort of a sealant (like gesso on canvas) as well as a brightener base on paper. It ensures an even coating of emulsion preventing it from soaking into the paper itself.
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I am wondering if anyone has noticed a change in the emulsion of this paper recently. It appears to me that the supercoating may be harder than it has been in the past. Any idea where I might go to find out if this is true?
Cheers -
george