SHA can be used for producing the high-grade packaging within12 colors, sealing width ≤10cm and needs printing registration. It is not easy to warp and curl after 125℃ retorting. It’s recommended to be used for non-heavy packaging products with single bag capacity less than 2kg, for example, retort pouch and cup lid with delicate patterns.

Notice: retortability and printability are depending on customers’ lamination and printing processing condition.

bad×      normal△      quite good○      excellent◎

The Small Dot/Shallow Net Lost

Print dots are missing or missed in the shallow position of the printed pattern (generally less than 30% of the dot, serious in 50% of the dot will also appear).

Causes:

Ink fineness is not enough, resulting in some large particles of ink cannot be filled to the network of shallow holes;

● Ink concentration is too thick, resulting in poor printing, the formation of dot hollowing;

● Scraper pressure is too large resulting in small amount of ink, ink supply is uneven, resulting in the loss of small dots;

● The use of too much quick-drying solvent, resulting in the ink drying up in the net hole and unable to attach to the film during the transfer process of the shallow net part;

● Printing speed is too slow, in the ink drying up in the net hole during the transfer process;

● Film surface is too rough; the underlying ink is not smooth.

Related Suggestions:

✔ Choose fineness ≤15μm ink;

✔ Appropriate dilute ink viscosity;

✔ The doctor blade should be adjusted to just scrape the ink, not to put too much pressure;

✔ Use less quick-drying solvent to adjust the drying speed of ink on the plate roller;

✔ Try to ensure that the speed of more than 160m/min printing.