a hand tool consisting of a handle fixed to a copper tip that is heated, electrically or in a flame, and used to melt and apply solder. Word Frequency. a pointed metal tool heated for use in melting and applying solder. More heat came from a small soldering iron which was slowly growing red at the side of the fire.
What is colour blindness? Colour (color) blindness (colour vision deficiency, or CVD) affects approximately 1 in 12 men (8%) and 1 in 200 women in the world. In Britain this means that there are approximately 2.7 million colour blind people (about 4.5% of the entire population), most of whom are male.
Color blindness is a very common disease which is found all over the world. Different scientific studies show, that roughly 8% of all men and 0.5% of all women are colorblind. This numbers are supported by different studies and are about the same all around the world.isit Colblindor at www.color-blindness.com and learn a lot more about color vision deficiency, try out some tools or even take some online color blindness tests. ï· Show the name of a color if you point to it. ï· Shift the whole color spectrum around the color wheel.