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US 2026/0201193 A1Published application
Wax crayon comprising calcium silicate
AssigneeSociete BIC
InventorsJulien GOUEREC, Justine NAPOLY, Allart VAN HOLTEN, Olav VAN CALDENBORGH
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Abstract
In a first aspect, a writing instrument includes a lead, wherein the lead includes at least about 0.01 wt.-% Ca2SiO4 particles, relative to the total weight of the lead, wherein the Ca2SiO4 has a D50 between about 5 μm to about 15 μm, and a BET-value between about 25 m2/g to about 55 m2/g.
Claims21
A writing instrument comprising a lead, wherein the lead comprises:
- at least about 0.01 wt.-% Ca2SiO4 particles, relative to the total weight of the lead,
- wherein the Ca2SiO4 particles have a D50 between about 5 μm to about 15 μm, and
- a BET-value between about 25 m2/g to about 55 m2/g.
3-15. (canceled)
Dependencies are inferred from the claim text.