Cleaning a pencil rubber, or eraser, depends largely on the type you are using. Different materials require different methods to remove collected graphite and dirt effectively.
Cleaning Kneaded Erasers
Kneaded erasers are unique because they don't wear down in the traditional sense. Instead, they work by absorbing and lifting graphite and other substances from the paper.
Based on how they function:
- They are able to absorb and flatten any substance. This includes the graphite and charcoal they pick up from your artwork.
- To clean a kneaded eraser, you simply knead and reshape it. Fold the dirty parts into the center and press and pull the putty-like material until a clean surface is exposed. This embeds the dirt inside the eraser, effectively cleaning the working surface.
- They are able to absorb water. However, caution is needed: if you add too much water it can become pulpy. This indicates that water is not the primary method for cleaning these erasers and using excessive amounts can ruin their texture and effectiveness. Stick to kneading for best results.
This process allows you to continuously refresh the surface of the eraser without losing material, until it becomes too saturated with dirt to absorb any more.
Cleaning Block Erasers (Plastic or Rubber)
Standard block erasers, like pink rubber or white plastic varieties, work by abrading the paper surface and lifting the graphite as they crumble. They get dirty on the surface over time.
To clean a block eraser:
- Find a clean, rough surface like a piece of scrap paper or a clean cloth.
- Rub the dirty surface of the eraser vigorously back and forth against the clean surface.
- Continue rubbing until the soiled layer is worn away and a fresh, clean part of the eraser is exposed.
- Brush away the eraser dust.
Summary of Cleaning Methods
Here's a quick overview:
| Eraser Type | How it Works | Cleaning Method | Key Consideration |
|---|---|---|---|
| Kneaded | Absorbs & Lifts (Pliable) | Knead and reshape to hide dirt internally | Avoid excessive water; it can make it pulpy. |
| Block (Plastic/Rubber) | Crumbles & Abrades | Rub on a clean surface (like paper) to wear away dirt | Creates eraser dust that needs to be removed. |
By using the correct method for your type of pencil rubber, you can ensure it performs optimally and lasts longer. For kneaded erasers, remember that their ability to absorb means avoiding liquids like excessive water is key to maintaining their texture.
