. Portrait . Benster Holder. Detail of New York Camera Stand r a i i To Settle Conflicting Ideas RegardingHypo-Alum Bath WE find that there are many conflicting ideas inregard to the proper mode of procedure forsuccessful results with the hypo-alum bath, andI hope in this letter to put the matter right and tell youof one method in the sample print department wherewe must make sepias in thousand lots and have them allalike and of the same high standard in quality obtainableon Professional Cyko by correct manipulation. First, let me say that due to these conflicting ideas itis necessary for us t
. Portrait . Benster Holder. Detail of New York Camera Stand r a i i To Settle Conflicting Ideas RegardingHypo-Alum Bath WE find that there are many conflicting ideas inregard to the proper mode of procedure forsuccessful results with the hypo-alum bath, andI hope in this letter to put the matter right and tell youof one method in the sample print department wherewe must make sepias in thousand lots and have them allalike and of the same high standard in quality obtainableon Professional Cyko by correct manipulation. First, let me say that due to these conflicting ideas itis necessary for us to go into the chemistry of the bathsomewhat, and show why troubles occur and why weshould use the standard formula as directed. All sulphurized hypo-alum combinations, with theexception of the iodide formula, ripened with the nec-essary amount of silver, give the same tones identically,provided the prints have the same manipulation. Itmakes no difference if it contains a little more or less ofhypo or alum, forty grains of si
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