Frequently Asked Questions
McCrone UK New Opening Hours
McCrone UK has changed its opening hours - 0800 to 1600 Monday to Friday. The orders will be sent out on Mondays and Wednesdays.
IMPORTANT UPDATE regarding Series E nD=1.550
IMPORTANT UPDATE - Series E nD=1.550 can spontaneously polymerize, causing the liquid to look cloudy and eventually this will cause the liquid to begin gelling. This process is irreversible, but it can be prevented/slowed by [...]
Changes regarding Cargille Series E RI 1.550
Cargille are in the process of changing the labels on Series E RI 1.550 bottles to show the correct storage requirements. – please disregard the existing storage information on these bottles.
Certificate of Assurance
If you need a Certificate of Assurance for your refractive index liquids as part of your quality management procedures then please just add one with your order under certificates in our shop.
How do you check that your refractive index liquid is still ok to use and has not been contaminated?
The suspect bottle is well shaken and three test slides made up without asbestos present. If asbestos fibres are observed using dispersion staining, crossed polars or first order red plate examination, then the liquid is [...]
Why is my refractive index liquid getting darker in colour?
Why is my refractive index liquid getting darker in colour? It is normal for these liquids to get darker as they age which may cause them to go from a light yellow to a dark [...]