Own Brand Brother HSe-621E Black on Yellow Heat Shrink Label Tape 9mm x 1.5m (Cartridge People)

I have used these tapes before and this is a restock for the next stage of the project. The tube shrinks well with hot air tools, I have also used the heat from a soldering iron, but whilst it shrinks the tube it does not always shrink evenly. The printed text is well defined, on either the white or yellow tube