How to choose Cold Hot laminator?

which one cold laminator are your correct in your business!(All Cold Laminator Working video).
this question which all first buyer wondering.
now we are telling about this question.
1. firstly you must need to know what is cold hot laminator , and why you need it :
Sign Makers use wide format printers from manufacturers including Roland, Mimaki, HP, Epson and Canon. They can be used to print all sorts of large graphics, including posters, signage, roll-up banners and window graphics.
Many companies are now diversifying into more areas of wide and grand format, including pop-up displays, exhibition & trade show graphics and vehicle wraps for cars, motor bikes, buses & even planes!
These still prints need protecting however. Lamination provides protection so they become weather resistant from the rain and sun. A laminated print will also save the customer money, as materials can be re-used and valuable graphics are protected and signs & posters are stiffened.

2. and then , you must to know what is different between cold laminator and hot laminator, if i am saying: it is very easy to know cold and hot cold laminator difference, 
cold laminator like some of same with hot laminator , only one thing different , it is the hot laminator has a hot bar and can adjust the hot Temperature,

3. think the size of the laminator , this is easy question, any buyer know what max working width of the hot or cold laminator you want before you make a buying , right!

4. cold lamintor and Hot laminator use different materails
cold laminator films is expensive than hot laminator , because the cold lamintor film has glue, and hot laminating film is very thin, just use the hot temperature to stick to the photo.