Cotton is referred to as ’heavy-weighted’, if the fiber has a grammage of more than 260 g / square meter.
This kind of quality is commonly used for special applications such as workwear or for textiles promotional products produced for outdoor useage as promotional items and giveaway.

The HKS-Colour Range includes 120 so-called full-tone colours, totalling 3,520 colour tones for art prints and uncoated paper, the point of which is to provide predictable repetition and conveyance of certain colour nuances in the graphics industry and on the promotional market for producing promotional items and giveaway.
HKS is the abbreviation for a brand, that is, a trademark of the manufacturer of printing ink and artist's colours Hostmann-Steinberg Druckfarben, Kast + Ehinger Druckfarben and H. Schmincke & Co.
An HKS-colour can, e.g., be produced in offset printing through the use of a nonstandard colour, (either industrially premixed or blended by a printer) or obtained  (approximately) through specified mixture-proportions of the printing inks cyan, magenta, yellow and black for all kinf of promotional products. The HKS-Colour Range is much more popular on the metall industry than for the production of promotional products, promotional items and giveaway.
But sometimes especially customers from the metall-industry provide the colour names of their logo for the production of their promotional items and giveaway in the HKS-Colour Range.

A stamp made of metal is heated and pressed through a color foil onto the material od the promotional items and giveaway. These materials of this promotional products need to be able to resist pressure and need to be formable through heat (e.g. leather, plastic). The heat of the samp, which can be made of either steal, brass or die-cast, temprorarily liquefies the color and leaves a color mark on the embossment.

A variety of colored and metallic foils, which are available in numerous color- and sparkling effects, enables a very decorative appeal on the promotional items and giveaway. Hot stamping without a foil is called blind stamping, which is mainly done for leather applications on promotional products.