Additional Information

Ishihara

In 1917 a professor at the University of Tokyo published test results that related to colour vision. Dr SNINOBU ISHIHARA was the professor and his test is still used today on people that might be suffering from protanopia (a lack of long-wavelength sensitive retinal cones) and deuteranopia (a lack of medium-wavelength cones) which makes the patient unable to distinguish between colours in the green-yellow-red section of the colour spectrum. Coloured plates are used as part of the ISHIHARA test and these plates contain a circle of dots that are both random in size and colour. The dots within the plate are formed to make a specific number and anyone with normal colour vision will be able to read them clearly. However, anyone suffering from a red-greed colour defect will struggle to see the number in the plates. Normally the main dots in the plate are coloured red and orange and the number will be in a shade of green. Patients are normally tested on 38 plates and after this has been done a clear indication about their condition will be reached. Plates are available from UK agents and anyone who wants to test their colour vision will be able to use the ISHIHARA assessment in a successful manner.

Munsell

Calibrating colours isn`t as difficult as you might imagine, especially when you have MUNSELL products to aid the process. Colour measurement can in fact be quite a simple task when certain colorimetry products are used. Customers might like to order a book of colours in either glossy or matte collections. The glossy collection contains over 1,600 colour samples on 40 separate pages. The mate collection is almost as comprehensive with 1,300 colour samples on 40 pages. Anyone that has colour requirements will be able to find MUNSELL products that can help. Agents for the products are found easily in the UK and they can provide a number of useful products. There are plant tissue colour charts that can be used to determine the colour of all types of plant tissues. Botanists will find these products to be extremely useful when they are out on site or working in their laboratories. The colour of each plant is important as they can help the botanist decipher growth rates, nutrient deficiencies or even plant diseases. This is just one practical way that MUNSELL colour charts can be put to good use and many other sectors find these products to be extremely useful items.

Soil chart

The colours of soils can be classified to indicate chemical, biological or other types of physical presences that might be contained with certain specimens. To help with the classification of soils there are certain soil charts available. A Soil chart has been developed with the U.S Soil Conservation Service and it provides an accurate colour comparison every time that it is used. Made by Munsell this effective type of guide is contained within a useful binder and it`s fully waterproof as you might imagine because once you are out on site you are exposed to the elements. Every Soil chart comes with over 322 colour chips which are mounted onto 11 indexed charts. There are a number of extra features on each soil chart to make life in the field a little easier. One of the pages contains a small ruler so that measuring can be carried out on site, whilst all the books include illustrations of soil grain structures plus useful charts to help estimate coarse fragments. Regular use will have its effect on the Soil chart and due to this the manufacturers recommend that each chart is replaced every 2 years to make sure that colour readings will continue to be accurate.