The main components of a print paste which may be used on nylon carpets include
dye, acid-producing agent, solubilising agent, sequestering agent, antifrosting agent,
antifoaming agent, swelling agent and thickening agent. Some agents fulfil more than
one of these functions, whilst the action of others may be somewhat obscure, even
though they may be described as wetting agents, lubricants, penetrating agents and so
forth.
Examination of practical print formulations often shows that they contain a
wide variety of agents which at some time have been considered to improve some
factor (possibly fortuitously) and which, as a result, have become established in use.
Since all contribute to the cost, it is clearly desirable to discard any agent which shows
no demonstrable beneficial action, and to use multipurpose agents wherever possible,
thereby operating with the simplest possible formulation.
The selection and application of dyes, auxiliary products and thickening agents will
now be considered in more detail. With the exception of thickening agents, the
printing technique employed does not affect the selection of the various print paste
components unless they have a deleterious effect on the materials of construction (for
example, solvents used as fibre-swelling agents may attack screen lacquers).
dye, acid-producing agent, solubilising agent, sequestering agent, antifrosting agent,
antifoaming agent, swelling agent and thickening agent. Some agents fulfil more than
one of these functions, whilst the action of others may be somewhat obscure, even
though they may be described as wetting agents, lubricants, penetrating agents and so
forth.
Examination of practical print formulations often shows that they contain a
wide variety of agents which at some time have been considered to improve some
factor (possibly fortuitously) and which, as a result, have become established in use.
Since all contribute to the cost, it is clearly desirable to discard any agent which shows
no demonstrable beneficial action, and to use multipurpose agents wherever possible,
thereby operating with the simplest possible formulation.
The selection and application of dyes, auxiliary products and thickening agents will
now be considered in more detail. With the exception of thickening agents, the
printing technique employed does not affect the selection of the various print paste
components unless they have a deleterious effect on the materials of construction (for
example, solvents used as fibre-swelling agents may attack screen lacquers).
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