Question

Do we roll or slide the eraser to remove the pencil work from our notebook?(reason)​

Answer 1

Question:

Do we roll or slide the eraser to remove the  pencil work?

Answer:

Both and neither - depending on the eraser being used, the degree of damage you want to avoid, and the depth of the graphite within the paper's tooth.

There are two basic types of eraser: solid block erasers, and malleable kneadable erasers.

And there are two basic ways of using either: sliding/rubbing and rolling/dabbing.

Rubbing is a necessary evil of solid erasers. Evil? Yes, because they work by shedding rubber to discard the removed graphite. That shedding requires a mechanical rubbing action, and that will inevitably force some graphite deeper into the paper. It will also alter or flatten the paper's tooth, so graphite might not be readily accepted by an erased area.

Rolling, or dabbing, is the preferred way to use kneadable erasers, because they absorb graphite. As no mechanical sliding action is required, graphite is lifted out of the tooth with no resulting damage or modification. Applying new drawing to an erased area is usually unaffected.

In order to understand why conventional solid erasers are not a good choice, you need to know about the properties of graphite. The crystalline structure is flat plates - that's why it's reflective and an excellent dry lubricant for machinery. Solid erasers, or any eraser used with a sliding or rubbing action, will pick up a layer of graphite. Once coated, it then slides those plates over the plates remaining on the paper. That causes smears, restricts further removal of graphite, and, as I mentioned, will probably push some graphite deeper. That last point is especially true, because as the eraser removes less, it’s human nature to apply more pressure.

Answer 2

Answer:

you slide the eraser. in rolling the side touching the ground changes everytime, but while rubbing we grab eraser tightly enough to hold it in one position and the side facing ground never changes and gets rubbed, thereby erasing all written work coming in contact (written with pencil).

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