Caroline Sharp in Germany had several generations of apparently tortoiseshell-tabby male cats. This should be impossible as tortie tomcats are genetically abnormal in some way and even when fertile they should not produce further generations of tortie tomcats. They couldn’t all be chimeras, so there had to be some unidentified mechanism at work. Other Siberian cats had both silver and golden areas of fur and were dubbed “bimetallic.” This X-colour (mystery colour) looked similar to the partway stages of the amber colour change seen in Norwegian Forest Cats. Siberian breeders had referred to their cats as "golden" but this term clashed with the wide band colour found in Persians, Exotics and British Shorthairs. The official term "sunshine" has been proposed to distinguish Siberian golden from "wide band golden". At birth, Siberian "Sunshine" resembles the early stages of the amber (ee) colour change in Norwegian Forest Cats caused by a non-extension gene
affected (or most often affected) are often those with grounding problems. Self-Induced ESD Any time you have a motor-driven system with belts, pulleys, plastic gears, or other insulating, moving components, you have the potential for self-induced ESD. Depending on the materials used, a belt running over a pulley can be an excellent Van DeGraff generator. Figure 8.7 illustrates a practical system that I worked on with serious self-induced ESD problems. A plastic band heater was wrapped partway around a rotating drum. Objects to be heated were guided under the heater, and the pressure between the heater and the drum performed a sealing action. The problem was that, somewhere between the prototype and production, someone discovered that they could get better heat transfer by changing the drum material. They changed it from a con- ductive to a nonconductive plastic. The result was that, under the right con- ditions, you could draw a spark a quarter-inch long from the back of the heater
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