The Uni-Ball Signo TSI (Thermo-Sensitive Ink) uses a specially-formulated ink, which changes from coloured to clear when heat is applied. Simply by rubbing the ink line with the cap of the pen, enough heat is generated to turn the ink clear - erasing the line cleanly. The same pen can then rewrite over the erased lines. Erased TSI lines will reappear if subjected to very low (-18 °C) temperatures.
When erasing, the ink initially disappears much quicker than other erasable pens. Dont be fooled though - a little extra heat is still needed at this point to stop the ink colour from coming back: just give the writing a couple of extra rubs and itll be invisible for good (unless you put it in the freezer of course).
Theres an eraser on top of the cap and one on the end of the pen, handy for those that like to place the cap on the end of the pen when writing as youll not have to remove the cap every time you need to erase something!
Delivery & Returns
We endeavour to dispatch orders within 5-7 working days but during particularly busy times of the year might see that move by a day or two.
Currently, Star School & Office Supplies only accept orders from and deliver to, Ireland, Northern Ireland.
We have no minimum order, however, orders under €75.00 will be charged carriage of €6.00.
All orders over €75.00 will be delivered free of charge in Republic of Ireland.
If you need a higher quantity than we have in stock not a problem, Call or Email us today to place you order over the phone.