Elmer's E543 Disappearing Purple Glue Sticks are designed for educational environments where safety and mess-reduction are key. The purple color acts as a visual guide, showing exactly where the glue has been applied so that children don't miss spots or use too much. The color naturally fades to clear as the water in the formula evaporates. This glue is specifically designed for bonding paper, cardboard, and other porous materials.
The stick is housed in a three-piece polypropylene assembly with a twist-up elevator and a friction-fit cap. To avoid the top layer of the glue becoming hard and crusty, the cap must be pushed on until an audible click is heard. The formula is 100% water-soluble, which means it can be cleaned off skin and out of clothes in a standard warm laundry cycle. It is also acid-free, making it a safe choice for photographs.
One limitation to keep in mind is that the internal plastic screw can strip if the glue is retracted with too much downward pressure. Additionally, because the formula has a high water content, using it on very thin paper might cause some warping. It is best used for simple paper crafts and school projects where high load-bearing strength is not required.
If you have a large classroom and need a higher volume, the 30-count pack of 7g sticks provides the same technology in a more cost-effective quantity.
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