STAEDTLER Lumocolor Permanent Pen - Superfine Line Width 0.4mm - Black

Yes, the ink is permanent, waterproof, and smudge-proof on most surfaces once dry. It is not intended for temporary markings.

According to ISO 554 test standards, the pen can be left uncapped for days without drying up. However, recapping after use is still recommended for maximum longevity.

While it can mark fabric, the permanence and washability may vary depending on the fabric type and care. For dedicated fabric pens, other specialized products might offer better results.

This includes common materials like paper, cardboard, plastic, glass, metal, wood, and overhead projector film. Performance may vary on highly textured or extremely non-porous surfaces.

For non-porous surfaces, a suitable solvent may remove fresh marks. For dried marks or on skin, washing with soap and water is the primary method.

The product description does not specify lightfastness. For applications requiring long-term exposure to sunlight, testing or using inks with known lightfast properties is advised.

This specific model is a disposable pen and is not designed to be refilled.

Ensure the cap has been removed. Try gently scribbling on a scrap piece of paper. If the issue persists, the ink may be low or the tip may be dry. Recap the pen for a few minutes, then try again. If the problem continues, ensure the pen has not been left uncapped for an extended period beyond its Dry Safe capability.

While the pen is designed to be smudge-proof, very glossy or non-porous surfaces may require longer drying times or may not achieve full permanence. Ensure the surface is clean and dry before writing. Allow ample drying time before touching the marked area.

This is a common characteristic of permanent, solvent-based inks. For very thin paper, consider using a barrier sheet underneath or switching to a different pen type if bleed-through is unacceptable for your application.