What is a printing varnish?
What is a printing varnish?
A varnish is a thin-protective layer that is applied to a printed sheet for protection or appearance. This coating has two options: UV- or aqueous-based. For packaging purposes, varnishes are essentially a clear ink that can be dull, satin, matte, or glossy.
What are different coating that are available in offset printing?
Types of print coating
- Aqueous Coating. Aqueous coating is a clear, fast-drying water-based coating that is used to protect printed pieces.
- Varnish. Varnish is basically clear ink and can be gloss, satin or matte.
- UV Coating.
- Soft Touch® Coating.
Can you write on aqueous coating?
AQ is short for Aqueous Coating. This is a semi-gloss, environmentally friendly, water-based coating applied to the front of the printed piece. It provides additional gloss and protection, and it can be written on with a ballpoint pen. It is not recommended for products you need to write on after being printed.
What is matte aqueous coating?
Matte aqueous coating is an in-line presentation folder coating as it is applied directly onto wet ink on an offset printing press. It provides a subtle matte finish (as opposed to gloss aqueous coating), and some protection from scuffing, while keeping color rich and vibrant on promotional products.
Can printing presses print varnish instead of ink?
A varnish is a coating that can be printed on a press like ink is. You can print the varnish either as a flood, which covers the entire print, or a spot varnish, which allows you to varnish only specific text, images or graphics on your printed piece.
Why varnish is used in printing?
The use of varnish tends to increase the gloss of a printed ink. Varnish is typically added to a finished printed piece either for aesthetic reasons (i.e., to increase gloss and provide a better overall look) or to protect the printing from wear and tear due to handling or contact with moisture or chemicals.
What is the difference between coating and varnish?
What’s the difference between coating and varnish? They provide better rub protection than varnish and increase durability of the printed piece. These low-cost, clear, water-based vegetable cellulose coatings are applied to the sheet after the ink. Sheets with aqueous coating can be handled almost immediately.
What is varnish in offset printing?
In offset printing, a varnish or aqueous coating is applied to the press sheet in two different ways. Offline varnishing applies the varnish or coating after the press sheet has dried. Both inline and offline varnishing provides your printed piece with added protection from scratching, fingerprints and scuffing.
What is the difference between UV and aqueous coating?
Aqueous coatings are less glossy than a UV coating and are more resistant to cracking when folded. Aqueous coating can only be applied as a flood, as opposed to UV coatings, which can be applied as either a flood or a spot. This is the least expensive finishing option.
What is aqueous print?
Aqueous coating is a clear, fast-drying water-based coating that is used to protect printed pieces. It provides a high-gloss, satin, or soft touch finish. Because it is water-based, aqueous coating is more environmentally friendly than varnish or UV coatings.
What is the difference between UV coating and aqueous?
When do you use a solvent borne coating?
Solvent-borne coatings are preferred for applications in humid environments that don’t allow water-borne coatings to cure properly. Solvent-borne coatings cure due to a chemical reaction between oxygen in the atmosphere and the constituents of the solvent-borne coating, and not by the evaporation of water.
How is matte varnish applied to a sheet of paper?
A matte varnish is first applied to all areas of a coated sheet, except those where a glossy effect is needed. A high gloss AQ coating floods over the entire sheet to allow the matte varnish ‘strike-through’ to the surface and leaving the glossy areas to shine.
What kind of varnish is best for multi-colour printing?
The matt varnish is ideally suited for straight-line printing on all multi-colour printing presses. Novacoat® 194207 is well suited for both wet on wet applications and wet on dry applications.
Which is the best overprint varnish for wet applications?
Novacoat® 194207 is well suited for both wet on wet applications and wet on dry applications. Novacoat® 4060 is a matt oil-based overprint varnish with increased oxidative drying. This enables rapid further processing as well as excellent rub protection.
