What makes these erasers different from just a sponge (that's what they look like)? What scientifically speaking makes them special?
1483710
I agree with the other reviewers- it is like a Magic Eraser, much finer "holes" than a regular sponge. Much better than the typical "furry" white board eraser. The material of the 3M Whiteboard eraser seems to "grip" the whiteboard marker on the whiteboard. Yes, you do need to rinse it out and I guess it won't last forever but the "furry" eraser I bought was completely worthless. This is much more durable.
1483711
Excellent question. A sponge would disintegrate on multiple hard contacts with another surface. The chemicals in the markers would help this process along. These erasers have matrlerial that makes them more durable to multiple uses and stands up better to the markers. All they need is to be washed and dried every now and then. Sponges may be able to do the same thing, but would not last as long.
1483712
I'm not sure about the science, I just know that they are the best that I have found.
1778260
They are comparable to the sponges you get in the stores. They are more dense. I use them for clay work but I think they are soft enough to use. They have different sea sponges in the package. They are not all the same. I loved mine but did not use them for my face. I wish I could give you a clearer answer..
311653
these are water-soluble. they will wipe off easily from a non-porous surface such as a cell phone. not suitable or recommended for the purpose you suggest.
1583763
No, just made by them. Use them all the time, they are great, not as expensive as sponges and don't mildew as quickly as they dry fast.
1761238
These things are better than Magic Erasers, they remove hard scale. I use them everywhere inThe bath and kitchen
1467702
Yes, they are erasable. The best thing to use is one of those soft gummy kind of erasers, less smudging. Also, if your paper has 'tooth' that is, if it is thick and has little bumps on it, what you cannot get off with the eraser, you can remove with a sharp blade by scratching at the surface of the paper. If all else fails, paint over it with some titanium white tube paint and make sure it is totally dry before proceeding to draw in that area again. Hope that helps. Jon Linden
1991991
I haven't needed to do anything special. Just a dry eraser or a dry cotton hand towel work for me on recent writing. Old writing is harder to remove. I use any dry erase board fluid sold specifically for a dry erase board.
600746
Well I DK t know about these, but I used to use other ones. And after I removed them it seemed like nothing was there before EVER. I think with these it'll be the same
757862
Bleach would be your best bet. If you're like me, and hate using bleach, try Mr. Clean eraser sponges. I also use Vinegar and dawn mixture. A 1/2 a cup of each in a spray bottle. Spray it and leave it on for a bit then scrub off. Good Luck!
2042102
They are great everyday erasers, but have the added feature of being like a "magic eraser" when dampened.
1385757
Each eraser is about 2.5" x 1" x .5" give or take a few eighths of an inch.
861685
They are definitely dust free, neatly erases mistakes. I first became axquainted with them during standardized testing where neat erasing is a must. Georgia
1405713
Technically yes, that is exactly how it works. Look up melamine foam. It is abrasive and porous on a microscopic level, and it sucks those stains up into the foam, destroying the foam in the process. But to feel the eraser with your hand, it is fairly soft, more like a sponge. The stain removing power really is amazing - I have used it to remove scuffs and crayon marks on walls, caked-on oven grease, and burn marks on a ceramic pan. I haven't had any materials get damaged with gentle use, but if you were to really worry a spot with the sponge, it would eventually wear through layers of paint.
2180426
Thank you. Yeah, I've already bought an extra pack just for the erasers. Now I've got pencils with no erasers, which is a sad waste. I just emailed Papermate and will hopefully get a positive response! Thanks again.
197623
The erasers are not normal erasers. They erase by friction and do not wear out at all. They do not break down or lose their ability to erase. I've had these pens since they first came out and the erasers are exactly the same as they were when I first bought them. As a side note: do not try to erase pencil lines with them. They will smudge pencil lines. If you have pencil and pen lines, erase the pencil lines first with a regular eraser.
1318927
IMO...these sponges are nothing but a marketing scheme...there is nothing in them and they are just low-density foam that falls apart in your hand.
843066
No, not the scrubby ones. They have a sponge that is, but it's just a regular sponge, without a scrubby side.