| Help & Frequently Asked
We are also happy to answer questions by email.
How thick is 2 Mil.
2 Mil. = 50.8 Microns = .0508 Millimeters = 2/1000 inch. The standard household
Ziploc® Brand sandwich bag is 1.5 Mil. The heavier freezer bags sold in stores are
about 3 Mil.
2 Mil. is the standard industry thickness.
is 4 Mil.
4 Mil. = 101.6 Microns = .1016 Millimeters = 4/1000 inch. 4 Mil bags are twice
as thick as the 2 Mil. bags and considered heavyweight.
is 6 Mil.
6 Mil. = 152.4 Microns = .1524 Millimeters = 6/1000 inch. 6 Mil bags are three times
as thick as the 2 Mil. bags and considered extra-heavyweight.
On the product listing pages the first number (W) is the width of the bag, the
second number (H) is the height. The width measures the size of the bag's opening.
The height is the distance from the zipper to the bottom of the bag. In other
words, the dimensions are approximately equal to the inside dimensions. A 3"x4"
piece of paper would just fit inside a 3"x4" Zip® bag.
accurate is sizing?
The size allowance for the plastic bags is +/- 1/8 inch.
|Are prices per 100 or per 1000 bags?
Prices are per thousand bags. (1000 bags)
When will my order ship
99.5% of orders are shipped within one business day.
of Zip® Bags
No plastic bags are waterproof. Left in contact with excess humidity or water,
moister will eventually build inside all standard LDPE plastic bags.
Is it safe to order online?
All credit card transactions placed with GTZIP® are handled automatically
by the Paypal secure computer system. Credit card numbers are not seen by the
staff at GTZIP®. Paypal is a trusted online payment gateway which is used
by millions. If there were ever any problems GTZIP® would assume full responsibility
in handling the situation for you.
|Why do you not carry bags less than 2 Mil.?
2 Mil. is considered the minimum guage for which the zipper can be molded as one
piece with the bag. For Zip® bags less than 2 Mil. the zipper must be laminated
on - this results in a noticeable loss of strength.
Do you carry ultra clear Zip® Bags?
Yes. Click here to view our selection of Ultra Clear Zip® Bags.
Do you carry archival bags?
Yes. Our Ultra Clear line of bags made from polypropylene are safe for archiving and conservation. Polypropylene is the most widely accepted commercial archival storage material in the United States. It is recommended by both the International Organization for Standardization ISO 10214:1991(E) Sect 4.3 and the American National Standards Institute ANSI IT9.2-1991 Sec 3.3. The polypropylene used in our Ultra Clear Bags is naturally acid free and lignin free and conform to PAT ISO standard 18916.