Viper XPT 6000, Руководство пользователя

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5. Type of Pretreatment:
Utilizing a white ink pretreatment versus a pretreatment for light
colored polyester fabrics will also result in a different amount of applied fluid
potentially.
General Rules of Application:
1. Variability:
There is some leeway in the amount of fluid applied. However, too much or
too little pretreatment can be an issue depending on the garment and pretreatment
fluid being used. Generally, too little pretreatment is the most common issue.
2. Amounts Applied:
Too much pretreatment can sometimes result in a crystallization of
the salts in the pretreatment fluid giving the shirt distinctive “white” specks in the
pretreated area.
3. Hovering:
Depending on the manufacturer’s pretreatment, sometimes it is necessary to
“hover” your heat press above the treated shirt to start steaming off the pretreatment
fluid. Then, the final press can be applied. We have seen where not doing this really
results in the crystallization of the salts resulting in “white” specks. Note: Not all
pretreatments require you to hover to work correctly.
4. Cover Sheet:
ALWAYS use a Teflon sheet or high quality craft or parchment type paper
(with release agent). You don’t want to pull up the shirt fibers after pressing. A non-
sticky surface really helps reduce fiber pull-up.
5. Pressure:
ALWAYS use the highest pressure you can on your heat press. A standard
manual heat press will work. A pneumatic heat press with 80 psi of pressure will work
even better.
6. PRESSURE IS THE KEY:
The high pressure of the heat press does two things. It really
helps to drive out the moisture in the pretreatment solution. The second is the pressure
helps matte the fibers of the garment down really flat while the pretreatment is cured.
Once cured, the pretreatment helps hold those fibers down flat, giving an incredibly
smooth printing surface for better white ink printing.
7. CURING IS A MUST:
A complete cure of the pretreatment is also a must. If the
pretreated garment has any moisture in it the final results of your white ink printing will
be less than satisfactory. The results can be poor colors, lower vibrancy and poor
washability.
8. Pre-Pretreating Garments:
You can pretreat your garments for future use. The longer
the shirts sit around the more they will reabsorb moisture from the air. Always re-
heatpress your shirts prior to printing if you are not pretreating and immediately
printing the shirts.