Using a putty rubber, also known as a kneaded eraser, primarily involves manipulating the material to keep it clean and effective for lifting graphite, charcoal, and other dry media from paper without creating dust like traditional erasers.
Essential Techniques for Using a Putty Rubber
Unlike standard erasers that wear away, a putty rubber works by absorbing pigment into its mass. To use it effectively, you manipulate its shape.
1. Kneading the Putty Rubber
The most fundamental technique mentioned in the reference is kneading. This process involves:
- "Pulling them apart."
- "And putting them back together again."
Repeatedly pulling the putty apart and folding it back together helps to embed the lifted pigment deeper into the eraser's body, exposing a fresh, clean surface on the exterior. This keeps the eraser effective for lifting more material.
2. Handling Dirt and Cleaning
Over time, the putty rubber will become saturated with pigment and "If they get too dirty," its effectiveness decreases. The reference notes, "You can even clean them." (Note: Cleaning methods typically involve washing with soap and water, though this specific detail isn't in the provided text). Kneading also helps to manage the dirt absorbed during use.
3. Identifying a Genuine Putty Rubber
The reference provides a crucial tip for recognizing a good quality kneaded eraser versus a poor one: "beware of this imposter." A genuine putty rubber should be pliable and easily manipulated. Imposters, on the other hand, are described as ones that "they don't pull apart. And they're a bit gritty yuck." A good sign of a quality putty rubber is its ability to be easily stretched, folded, and kneaded without crumbling or feeling gritty.
In summary, effective use of a putty rubber involves consistent kneading to refresh the surface and absorb lifted material, along with occasional cleaning when it becomes saturated. Choosing a putty rubber that can be easily pulled apart and isn't gritty is key to a good experience.
