The Clarity of gelatine solutions is the desirable property.
High clarity is achieved in the absence of insoluble particulate matter which scatters light
(and causes cloudiness in solutions.) Ideally, the clarity of gelatine in
aqueous solution should be equal to that of
distilled water but for various technical reasons
this is not possible. Hence it is necessary to
understand and measure the deviations from the ideal. This can be done using ‘turbidity’
(Optek Website, June 2012) for which there are EPA
approved Formazin standards for comparative purposes.
There does not appear to be any specific research
on gelatine clarity but one can learn from
what we already know.