The present disclosure relates to a writing instrument comprising a lead, wherein the lead comprises at least about 0.5 wt.-% ZrO.sub.2, relative to the total weight of the lead, in particular wherein the lead comprises less than about 0.5 wt.-%, more specifically less than about 0.2 wt.-% and in particular substantially no or no TiO.sub.2.

The present disclosure relates to a writing instrument comprising a lead, wherein the lead comprises at least about 0.5 wt.-% ZrO.sub.2, relative to the total weight of the lead, in particular wherein the lead comprises less than about 0.5 wt.-%, more specifically less than about 0.2 wt.-% and in particular substantially no or no TiO.sub.2.

Provided is a color pencil lead which is excellent in a hue, a light resistance and a strength and can be erased with an eraser and which is suited to pencil leads for mechanical pencils and wooden pattern holder pencils. The above color pencil lead is characterized by containing a resin in which a dye is dissolved or included in a pencil lead body.

Provided is a color pencil lead which is excellent in a hue, a light resistance and a strength and can be erased with an eraser and which is suited to pencil leads for mechanical pencils and wooden pattern holder pencils. The above color pencil lead is characterized by containing a resin in which a dye is dissolved or included in a pencil lead body.

A seed-containing crayon. The crayon includes an elongated member formed of a marking composition to leave a colored mark on a surface when the elongated member contacts the surface. The marking composition is formed of a wax, a pigment, and a plant nutrient that is activated by application of water to the elongated member. Plant seeds are embedded in the marking composition of the elongated member. The crayon can include a paper band that at least partially surrounds the elongated member along at least part of the length of the elongated member in which the plant seeds are embedded.

A seed-containing crayon. The crayon includes an elongated member formed of a marking composition to leave a colored mark on a surface when the elongated member contacts the surface. The marking composition is formed of a wax, a pigment, and a plant nutrient that is activated by application of water to the elongated member. Plant seeds are embedded in the marking composition of the elongated member. The crayon can include a paper band that at least partially surrounds the elongated member along at least part of the length of the elongated member in which the plant seeds are embedded.

Reversible thermochromic and photochromic ink compositions and markers, pens or writing instruments that use them are herein disclosed.

Reversible thermochromic and photochromic ink compositions and markers, pens or writing instruments that use them are herein disclosed.

The present invention relates to a solid tempera and to the method for manufacturing the same, which includes a dispersion of resin having a concentration value of 10% to 70%, sodium stearate having a concentration of 10% to 20%, glycerine having a concentration value of 4% to 20%, water having a concentration of 7% to 50%, a pigment having a concentration value of 5% to 15%, an anti-foaming agent having a concentration of 1% to 3%, and a biocide having a concentration of 0.10% to 0.4%, the above concentration values relating to the final product. The tempera of the invention is used for painting or drawing on a substrate such as paper, Bristol board, wood or cardboard, being applied directly to said substrates without having to add water.

The present invention relates to a solid tempera and to the method for manufacturing the same, which includes a dispersion of resin having a concentration value of 10% to 70%, sodium stearate having a concentration of 10% to 20%, glycerine having a concentration value of 4% to 20%, water having a concentration of 7% to 50%, a pigment having a concentration value of 5% to 15%, an anti-foaming agent having a concentration of 1% to 3%, and a biocide having a concentration of 0.10% to 0.4%, the above concentration values relating to the final product. The tempera of the invention is used for painting or drawing on a substrate such as paper, Bristol board, wood or cardboard, being applied directly to said substrates without having to add water.