Blogs
ASBC Beer Color and Turbidity
Posted on by Ganesh Ramanathan
ASBC Color The ASBC Beer Color scale has a range of approximately 1 to 11 units, with the more yellow, pale worts at the low end of the scale and the redder color of dark worts, beers and caramels at the upper end of the scale. The industry reference method for ASBC Beer Color and […]
Color and haze measurement of fruit drinks and carbonated beverages
Posted on by Ganesh Ramanathan
FAQ: “I have worked with a company measuring the color of sports drinks. Now this company is interested in fruit drinks and also in carbonated soft drinks. Have you worked with these types of beverages? Any advice or recommendations?” Fruit drinks contain: water corn sweeteners may contain some fruit juice or fruit solids flavors (oil […]
How do you validate a APHA/Pt-Co/Hazen 500 liquid color standard?
Posted on by Ganesh Ramanathan
As described in Section 6 of ASTM D1209, there are 2 criteria to validate a APHA/Pt-Co 500 standard:
Is it possible to create ASTM traceable haze standards above 30%?
Posted on by Ganesh Ramanathan
The current, available ASTM D1003 Haze Standards have nominal Haze% values of 1, 5, 10, 20 and 30 with air (transparent solids) or the transmission cell filled with DI water being 0 (transparent liquids). Here are some thoughts on further options.
SPC Results for Diagnostic Didymium Filter Test
Posted on by Ganesh Ramanathan
FAQ: “We take the results from the Didymium Filter Test on our HunterLab ColorQuest XT and plot them in an SPC chart over time to look at trends. We are seeing the 430 and 570 nm filters slowly decrease. Can you help us understand what may be occurring?”
Do you know what Molten Color is?
Posted on by Ganesh Ramanathan
FAQ:”A client is asking me to measure something they call “Molten Color’. Do you have any information on this? Do Hunterlab instrument have a function for this color?”
Measuring the Color of Clear Liquids
Posted on by Ganesh Ramanathan
HunterLab diffuse sphere instruments are often used to measure liquid samples, especially clear liquids. The liquid fragrance shown above is one such example of a clear liquid. The fragrances is so clear that is resembles water. Fragrances such as this are often added to cleaning supplies, air fresheners, or other consumer products. One of the […]
Do you have a source for calibrated, traceable transmission filters?
Posted on by Ganesh Ramanathan
HunterLab does not supply glass or plastic filter transmission standards but here are some sources.
The details of how HunterLab sphere instruments conform to ASTM D1003 Section 8: Procedure B Spectrophotometer for transmission haze measurement
Posted on by Ganesh Ramanathan
HunterLab sphere instruments with CIE d/8 geometries conform to the requirements of ASTM D1003 Section 8: Procedure B Spectrophotometer. The measurement of transmission haze using Procedure B instruments will be in close agreement with ASTM D1003 Procedure A Haze meter. Here is a more detailed description of how the HunterLab UltraScan PRO, UltraScan VIS and […]
How is ASTM D1003 Transmission Haze measured at levels > 30%?
Posted on by Ganesh Ramanathan
FAQ: “We have a scientist here who is looking at films containing small bubbles and attempting to do measure them by measuring Haze% on a HunterLab spectrophotometer. I suspect her problem in obtaining numbers that “make sense” from what you get from just eyeballing the samples (and trying to look through them at the outlines […]
Measuring the Color of Clear Liquids
Posted on by Ganesh Ramanathan
One application that often comes up is measuring the color of clean liquids such as the fragrance sample seen above. This liquid fragrances is clear and looks almost like water. Fragrances such as this are often added to cleaning supplies, air fresheners, or other consumer products. One of the problems that this type of sample […]