While there are many techniques, at some point somebody tought of using heat in the tranferring process. Finding actual data about thermography is rather difficult, but the real development of printing techniques took place around the 1900’s.
Back then, this technique was regarded as a means of obtaining novelty effects and all the work was done by hand as thermographic priting machines were not developed. Used as a craft, thermography went on until arount 1915 when was invented the first automatically machine. From now on with the halp of machines it was only practical the printing shuold be involved in the process.[adsenseyu1]
Thermography printing is a printing technique that allows obtaining areas in relief on printed sheets. The process entails spraying a thermographic powder over freshly printed sheet and the sheet passing through an oven.
Thermographic powder will adhere only to areas with undried,fresh ink, and at the passagethrough the oven it will expand, thus obtaining highlighting of the area of interest. In that area depending on the type of powder used, it can be obtained emboss, varnishing or smoothing effects.
This popular method of printing using heat to fuse powdered ink and resin,has as a result in relief letters. Even if the process resembles engraved printing, thermography is much cheaper, but it will reproduce details as distinct as engraving. As the technology and the printing machines evolved this type of printing became one of the highest profiles to deliver a message.
And even if it is seen as an alternative of engraving it is versatile enough to satisfy exquisite preferences. Perhaps the only shortcoming is that it is not recommended for heavy solid materials and fine printing supports.
Among the most common aplications one can find: letterheads, invitations (especially wedding invitations), creating braille effect on text, and official documents such as diplomas and certificates.
Among other things one should be aware of when using thermography printing is that, being a type of raised printing, it can be used only on one side of the paper. Raised priting also implies not using it over folds or cosed to the edges of the printing supports because raised ink fractures when folded.
When it comes to letterhead, for example the best option is “laser safe” thermography otherwise the ink does not melt under the heat of these kind of devices. Temperature being a key factor in this type of printing, thermografic printing machines are designed to withstand high temperatures without distorting colours or produce smears on the surface.
In conclusion, a suitable definition for thermographic printing would be the application of thermography where heat is being used to create special effects on paper. If you are looking to raise the standards and make your work easier, http://www.allforprintmarket.com/2-printing-machines/ is the special place, having special offers covering the whole area regarding thermography equipments ready to meet any requiry from the public.
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