This experiment measured the transmittance and absorbance of an Allura Red solution combined with a bleach solution. Allura Red is a powdered azo dye utilized in the food, drug, cosmetic, leather, and ...

Allura Red, a red powdered azo dye, is commonly used in the cosmetic, food, textile, paper, and drug industries. Allura Red goes by several names, the most common being Red 40 or E129. Azo dyes are ...

[Jure Spiler] was at a flea market and got himself a spectrophotometer — a device that measures absorbance and transmittance of light at different wavelengths. This particular model seems to be about ...

[Jure Spiler] came into possession of an old spectrophotometer, which measures the absorbance and transmittance of light in a sample. Getting data out of the device was difficult, particularly as the ...