I recently used the Sponsor Marking Kit and followed the instructions, setting my iron as close to 160 degrees Celsius as I could (My iron does not show exact temperatures and only uses symbols). After doing so, I successfully was able to use the marking kit, however, it looks more gray in color instead of white like the other parts of the jersey's markings, so did I do it correctly? Was it too hot or did I press for too long, or is it supposed to look a little darker/more gray after ironing?