A method of processing a polycrystalline diamond element is disclosed. The method may include depositing a vaporized material over a selected portion of a polycrystalline diamond element to form a protective coating over the selected portion. The polycrystalline diamond element may include a polycrystalline diamond table. The method may also include exposing at least a portion of the polycrystalline diamond element to a leaching solution such that the leaching solution contacts an exposed surface region of the polycrystalline diamond table and at least a portion of the protective coating. The method may also include removing the polycrystalline diamond element from the leaching solution. The protective coating may be substantially impermeable to the leaching solution.

A carbonless copy note pad includes a stack of note sheet sets. Each of note sheet sets includes first and second paper sheets, first and second adhesive layers, a color-developing coating layer, and a coarse particle coating layer. The color-developing coating layer is formed on at least one of the first and second paper sheets. The coarse particle coating layer is formed on a lower surface of the second paper sheet, and has a roughened surface to prevent a scribbling pressure applied to a writing surface of the first paper sheet of a topmost one of the note sheet sets from affecting a next one of the note sheet sets.

A label structure includes: a base material including a print area on which information arranged in a predetermined direction is printed on a front surface of the base material; an adhesive portion in which an adhesive is laminated on a back surface of the base material; and a separator configured to cover the adhesive portion. At least the print area of the base material is formed with a base material partition portion partitioned by a base material tear-off line, the base material partition portion includes a plurality of intersections extending in a direction intersecting with the predetermined direction, and the separator is formed with a separator partition portion partitioned by a separator tear-off line in an area corresponding to at least a part of an area corresponding to the base material partition portion.