How to interpret Haze Tolerance, e.g. Performance +/- 0.30% @ 10% TH Follow

Question: How to interpret Haze Tolerance?  e.g. Performance +/- 0.30% @ 10% TH

Answer: Most indices such as APHA, EP Color, Gardner, Saybolt, NTU and USP are based physical standards. A Haze measurement is determined by the instrument geometry being exact, not by how it reads a physical standard. There is no formula for how to create a Haze Standard with a value equal to 10. The user guesses at what will produce a value close to 10 then measures it on an instrument that meets the exact geometry and measurement conditions for Haze and records the result.  Typically a 10% Haze Standard will have an assigned value between 8.5 and 11 %TH. The tolerance for a Haze Std is +/- 10% of its assigned value. For example if the standard is assigned at 8.5 %TH then the tolerance is 8.5 +/- 0.85 %TH, for 11 %TH the tolerance is +/- 1.1 and so on for any Haze Standards in the 10 %TH range.

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