Abstract
Original scientific paper This paper presents experimental usage of updated control methods such as thermovision and spectrophotometric analysis in graphic industry. These methods were applied to research the influence of ink volume and material characteristics on colour and heat treated printed substrates. Samples used in these experiments were printed by digital ink jet printing technique using Mimaki JV22 printing machine and J-Eco Subly Nano inks. As printing substrates, three different types of materials were used. Materials were different in respect of fabric weight and thread count, while material composition was the same for all three materials. The appropriate test card consisting of fields of CMYK colours was printed, varying the number of ink layers applied. Samples were exposed to heat treatment after printing. The heat applied was measured by thermovision camera. Spectrophotometric measurements were conducted before and after heat treatment. Based on data gathered by spectrophotometric measurements colour difference ΔE76 was calculated. Results showed that increasing number of layers, as well as right choice of substrates, can improve behaviour of printed product during exploitation.
Highlights
In order to achieve the best possible quality of final product, manufacturers have to use measurements and control techniques up to date, regardless of the industry type
Thermovision measurements enable control of process parameters that have influence on quality of final products especially textile products that are usually exposed to heat treatment
In the same table colour difference between samples and sample printed with five ink layers was given
Summary
In order to achieve the best possible quality of final product, manufacturers have to use measurements and control techniques up to date, regardless of the industry type. The quality of colour reproduction on textile materials is influenced by wide variety of factors, such as graphic system used for printing, ink volume, ink characteristics, substrate characteristics, etc. Colour difference can be calculated based on colour characteristics measured by instrument, provide objective information of colour reproduction and any changes in colour during production or exploitation. Thermovision cameras give precise information related to temperatures in certain areas of heating element surface This is possible by capturing image of infra-red radiation. This material is commonly used in production of graphic products that are exposed to environmental influences and demand long exploitation periods (for example flags, billboards, sport wear etc.) The purpose of this conducted experiment is to determine how characteristics of material and number of ink layers of printed product which are exposed to standard heating treatment will influence print quality
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