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Technical Library / Drying & pre-finishing (23 Items Found)

Leather drying and conditioning:Radiation drying [premium content]
Two types of radiation drying have been adopted: • High frequency for removing moisture and water based finish drying • Infrared for finish drying A third type, microwave generated radiation, was developed for leather drying but proved to be uneconomical and impractical for the purpose.

World Leather - 01 - Feb/Mar 2008

Pre-finishing and Finishing Part 2: Padding Techniques [premium content]
The application of finishing products by means of padding may be carried out manually, possibly with some mechanical assistance or with automatic or semi automatic machinery.

World Leather - 01 - Feb/Mar 2008

Leather drying and conditioning: Conditioning - Staking - Milling [premium content]
The conditioning of leather is the process of bringing its moisture content to the level required for the staking operation. Raising the moisture content brings back fibre structure elasticity and allows the fibres to move freely against each other. Repeated multidirectional tension and bending forces as applied in staking can then make the leather soft and supple. Depending upon the characteristics of the leather there is an upper limit upon the reintroduced moisture level. This is because any subsequent drying to equilibrium condition may lead to renewed hardening or “seizing” of the fibres, and to losing the desired softness. Conditioning is a consequence of the need to “dry out” dyed leathers completely if an acceptable uniformity of water content across the leather is to be obtained.

World Leather - 01 - Feb/Mar 2008

Pre-finishing and finishing: Part 1 Buffing [premium content]
Buffing is a pre-finishing operation designed to ready the leather surface for the application of finishing products, and to determine specific appearance as well as certain surface characteristics. It is a process of abrasion to refine the grain or to remove part of it. The flesh side of leather may also be buffed, cleaning the flesh and helping to achieve uniform substance. Historically, experienced leather workers were needed to manually present the leather pieces to abrasive wheels. Modern methods use complex rotary machines which can produce precise results. Only limited operator skill and experience is required to feed such machines but extensive knowhow is needed to set their work parameters to produce the desired results.

World Leather - 01 - Feb/Mar 2008

Back to Basics: A Framework for Leather Manufacture - Essay 22 [premium content]
Leather drying and conditioning: Paste drying

World Leather - 08 - Dec/Jan 2007

Back to Basics: A Framework for Leather Manufacture — Essay 21 [premium content]
Leather drying and conditioning: Vacuum drying

World Leather - 07 - Nov 2007

Back to Basics: A Framework for Leather Manufacture – Essay 20 [premium content]
Leather drying and conditioning: Toggle drying

World Leather - 06 - Oct 2007

Back to Basics: A Framework for Leather Manufacture - Essay 19 [premium content]
Leather drying and conditioning

World Leather - 05 - Aug/Sept 2007

Back to Basics: A Framework for Leather Manufacture - Essay 18 [premium content]
Leather drying and conditioning: The physics of drying.

World Leather - 04 - June/July 2007

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