All Things Recoil
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Re: Making a scene
Edited by John Bolton on 12/24/2018, 9:27 am
There are many substances that will fluoresce in ultraviolet light, it is simply that certain crystals refract that wavelength of light in a manner that causes the emission of light of different wavelength that we perceive as a different colour. This is how optical brighteners work. White linen treated with an OB will appear blue-tinted in UV but in white light the effect is to cancel out the natural yellowing that occurs with vegetable fibres, correcting the perceived colour as a truer White.
A hydrometer will give a true reading of specific gravity that can be matched to specific liquid conditions at specific temperatures, so it can distinguish between different liquids whereas UV light cannot,
John Bolton MBICSc
The JAGUAR MX-2 ETM @ crossamericancorp.com