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| APPLICATION TERMINOLOGY |
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| PLASTIC BAG TERMINOLOGY |
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Cast Coated (Frosted) - |
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A process whereby a wet coating is press against a hot or warm metal drum giving it (in this case a plastic bag) an enhanced finish. |
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HDPE – |
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(High Density Polyethylene) Most common use is for produce bags in grocery stores. |
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HDPE Frosted - |
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Bag tends to be more rigid due to it being a blend. It does not look like the above bag. |
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LDPE - |
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Low Density Polyethylene |
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Micron - |
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A measure of length; the thousandth part of one millimeter; the millionth part of a meter. This is a common measurement for width of plastics. If you want to convert from the American form of measurement of mil(s) to microns, you can multiply the mil by 25 to get to the number of microns. |
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PET – |
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Polyethylene Terephthalate is a plastic resin used to make items like soft drink bottles, “custom” bottles and other consumer products. It is also used for film, oven trays, sheeting for cups, food trays and other uses. |
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PP -
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(Polypropylene) |
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PVC – |
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(Poly Vinyl Chloride) Often used for flexible see-through cosmetic bags. |
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| PRINTING TERMINOLOGY |
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COLOR KEY |
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A color key is the proof that consists of four or more layers of film (yellow, magenta, cyan, black, and some custom colors perhaps) one color per film. The dot pattern on each is consistent with the dot pattern produced during the printing process. It is also viable for printing two color jobs. This process comes in handy for checking fit, registration, color breaks or adding 5 th and 6 th colors over matchprint proofs. |
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FLEXO PRINTING |
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Frequently used for printing on plastic, foil, acetate film, brown paper, and other materials used in packaging, flexography uses flexible printing plates made of rubber or plastic. The inked plates with a slightly raised image are rotated on a cylinder which transfers the image to the substrate. Flexography uses fast-drying inks, is a high-speed print process, can print on many types of absorbent and non- absorbent materials, and can print continuous patterns such as gift wrap. |
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4- COLOR PROCESS |
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The subtractive primaries: yellow, magenta and cyan, plus black in four-color process printing. These four inks can combine to reproduce full-color artwork and designs. |
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HALFTONES OR SCREENINGS |
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This refers to the dot pattern that gives the art dimension- t he gray-colored tones halfway between shadows and highlights in a reproduced image. |
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MATCHPRINT |
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A matchprint is a full color copy made from the actual negatives your file will be printed from. It is a good way to verify the color information. |
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It is important to note that when you transfer colors from your screen to paper, some important things happen. First, your image is going from a backlit RGB (Red, Green, Blue) to a flat CMYK (cyan, magenta, yellow and black) with layer on layer of color on top of each other creating a more opaque look. So, colors that can be produced on the screen cannot be reproduced on paper or when printed. |
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OFFSET PRINTING |
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Any form of printing in which the ink transfer is not made directly from the plate to the paper. The offset is supplied by the use of a blanket (a large rubber roller). The plate transfers the ink to the blanket which, in turn, transfers the ink to the paper. The most common form is offset lithography (also the most common method of commercial printing overall). Letterpress and gravure are two other printing methods that can be offset. Offset lithography is distinguished from these two by the fact that there is no etched or raised surface on the plate; the separation of printing and non-printing areas is made chemically, rather than physically. |
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PAPER QUALITY |
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This is a big factor in determining screen frequency. If the paper is porous, dot gain will obviate any detail that could be gained from using a high screen frequency. Papers come in a large variety of types and are intended for many different purposes. The basic types of paper we use and how they affect dot gain are as follows: |
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• Uncoated Paper - Any number of different paper types that are unvarnished. Dot gain for uncoated paper is roughly 12%. |
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• Coated Paper - Paper that has been given a varnish coat. This helps to seal the paper and reduce dot gain (which runs at about 8% on average). High quality grayscale and four-color images are printed on coated stock. |
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VARNISHES |
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After the printing is laid down on the sheet of paper, a varnish can then be put down over the printing. The options are an aqueous- or very shiny, ultra violet or UV which is exceptionally shiny or matte which gives the surface a smooth, non-reflective finish. |
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| CONVERSION CHARTS |
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| STOCK BAG SUGGESTIONS |
| SHOPPING BAGS - STOCK SIZES |
MATERIAL/PRINTING OPTIONS |
STYLE |
WIDTH |
DEPTH |
HEIGHT |
GEM |
5 1/4” |
3 1/4” |
8 1/2” |
VENO |
5 1/4” |
3 1/4” |
13” |
CUB / CHIMP |
7 3/4” |
4 3/4” |
9 3/4” |
DEBBIE / ANTELOPE |
10” |
5” |
13” |
ESCORT / GAZELLE |
13” |
6” |
15 1/4” |
SENIOR /IMPALA/ |
13” |
7” |
17” |
LION |
15” |
9 1/2” |
16 1/4” |
VOGUE / JAGUAR |
16” |
6” |
12” |
CLASSIC / TIGER |
16” |
6” |
15 3/4” |
QUEEN / ZEBRA/ |
16” |
6” |
18 1/2” |
JUMBO / HIPPO |
18” |
7” |
18 1/2” |
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| Medium: |
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Metallic, Art Paper, Art Board, Kraft, Kraft Groove, PVC, PET, PP, HDPE, LDPE, Corrugated, Canvas |
| Printing: |
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8-Color Capacity |
| Lamination: |
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Glossy, Matt or Other |
| Varnish: |
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UV (ultra-violet), Aqueous, Matt |
| Additional Processes: |
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Embossed (this will add a die charge), Hot Stamping |
| Bag Handles: |
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Cotton, Ribbon, Poly-Prop (Nylon), and Jute, Paper |
| Handle Attachment Options: |
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4-Knots (Standard), Grommets/Eyelets, Rivets |
| Bag Shape Options: |
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Square, Rectangular, and Trapezoid |
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| COVER BOARD STOCK |
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| METRIC COVERSION CHART |
STOCK BAG SUGGESTIONS |
| GSM |
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Lbs. |
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Pt. |
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190 gsm |
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70 lb. |
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8 pt. |
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210 gsm |
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78 lb. |
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9 pt. |
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230 gsm |
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85 lb. |
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10 pt. |
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260 gsm |
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96 lb. |
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12 pt. |
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310 gsm |
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115 lb. |
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14 pt. |
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360 gsm |
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133 lb. |
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16 pt. |
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| GSM |
lbs. |
Reccomendation |
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120 gsm |
81 lb. |
Best for medium size bags |
150 gsm |
106 lb. |
Best for medium size bags |
180 gsm |
122 lb. |
Best for large and oversize bags |
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| FILM THICKNESS CONVERSION CHART |
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| MIL - INCHES - MICRON CONVERSION CHART |
CHOOSING FILM THICKNESSES - Your decision regard the thickness of film is dependent on how much weight your bag will be holding. The following are some rules of thumb regarding this issue:
EXTRA HEAVY – Consider using a 6 mil for supporting the heaviest of content usage. HEAVY - A 3 or 4mil bag is suggested for supporting heavy and rough objects. MEDIUM - Everyday usage can be accommodated with a 1.5 or 2mil bag. LIGHT - Lightweight objects such as t-shirts can be safely packaged using a 1 or 1.25mil bag. These are also most often what are used for produce in grocery stores.
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| FILM THICKNESS CONVERSION CHART |
| INCH |
MIL |
MICRON |
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INCH |
MIL |
MICRON |
| 0.0003 |
0.30 |
7.26 |
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0.001 |
0.95 |
24.13 |
| 0.00035 |
0.35 |
8.89 |
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0.001 |
1.00 |
25.40 |
| 0.0004 |
0.40 |
10.16 |
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0.0015 |
1.50 |
38.10 |
| 0.00045 |
0.45 |
11.43 |
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0.002 |
2.00 |
50.80 |
| 0.0005 |
0.50 |
12.70 |
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0.0025 |
2.50 |
63.50 |
| 0.00055 |
0.55 |
13.97 |
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0.003 |
3.00 |
76.20 |
| 0.0006 |
0.60 |
15.24 |
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0.0035 |
3.50 |
88.90 |
| 0.00065 |
0.65 |
16.51 |
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0.004 |
4.00 |
101.60 |
| 0.0007 |
0.70 |
17.78 |
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0.0045 |
4.50 |
114.30 |
| 0.00075 |
0.75 |
19.05 |
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0.005 |
5.00 |
127.00 |
| 0.0008 |
0.80 |
20.32 |
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0.0055 |
5.50 |
139.70 |
| 0.00085 |
0.85 |
21.59 |
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0.006 |
6.00 |
152.40 |
| 0.0009 |
0.90 |
22.86 |
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0.007 |
7.00 |
177.80 |
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