The Process Flow for Wood Grain Transfer Printing on Window and Door Profiles

Below, we'll provide a detailed explanation of the wood-grain transfer printing process for you.
　　Wood grain has excellent adhesion to aluminum, is non-toxic, odorless, and easy to clean. The product features clear, lifelike patterns with strong three-dimensional effects, delivering outstanding aesthetic appeal that evokes a natural, earthy charm—bringing you back to the simplicity and beauty of nature. Additionally, the coating applied to the surface of the sprayed aluminum profiles remains stable in the air, neither volatilizing nor oxidizing, ensuring zero environmental pollution. And any dirt or grime deposited on the coated surface can be effortlessly restored to its original luster and pristine appearance with just a simple cleaning process.

　　Below, we'll详细介绍 the wood-grain transfer printing process for you.
　　Process 1: Suitable for large-area or irregularly shaped substrates
　　Step 1: Select the substrate that has already been spray-coated or electrophoretically treated.
　　Step 2: Wrap the substrate to be transferred with wood-grain heat-transfer paper, and secure the edges of the paper using high-temperature-resistant tape to prevent the wood-grain heat-transfer paper from coming loose. (Note: The printed side of the wood-grain heat-transfer paper should face the substrate being transferred.)
　　Step 3: Next, place a high-temperature-resistant, highly sealable tubular plastic bag over the substrate already wrapped with wood-grain heat-transfer paper. Then, evacuate the air from both ends of the plastic bag until it adheres tightly and effectively to the substrate.

　　The magnitude of the vacuum's negative pressure should be adjusted appropriately based on factors such as the characteristics of the substrate being transferred and the maximum negative pressure the plastic bag can withstand—typically ranging between 0.3 and 0.8 MPa. (Note: The purpose of using the plastic bag is to leverage the negative pressure, forcing the wood-grain heat transfer paper, which is already tightly adhered to the substrate, to bond fully and effectively onto the material.)
　　Step 4: Transfer the already wrapped substrate into the oven for baking. The baking temperature and duration should be adjusted appropriately based on factors such as the characteristics of the substrate being transferred, the desired depth of the texture to be printed, and the specific performance of the oven. Typically, the transfer temperature ranges from 160°C to 180°C, with a baking time of 5 to 8 minutes.
　　Step 5: Remove the transferred substrate from the oven, pull off the plastic bag from one end of the transferred substrate, peel off the thermal transfer paper, and then perform surface cleaning.
　　Process 2: Suitable for flat substrates
　　Step 1: Select the substrate that has already been spray-coated or electrophoretically treated.
　　Step 2: Place the wood-grain heat transfer paper face up directly against the front side of the substrate to be transferred.
　　Step 3: Apply pressure and heat using a flatbed heat transfer machine—typically, the transfer temperature is set between 160°C and 180°C, with a duration of 18 to 25 seconds.
　　Step 4: Peel off the thermal transfer paper and use the PET thermal transfer film for transferring.

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　　Technique 3: Suitable for Irregularly Shaped Substrates
　　Step 1: Select the substrate that has already been spray-coated or electrophoretically treated.
　　Step 2: Wrap the substrate to be transferred with the PET heat-transfer film, then use an ultrasonic sealing machine to seal the PET film into a tubular bag. (Note: The printed side of the PET heat-transfer film must face the surface of the substrate intended for transfer.)
　　Step 3: Create a vacuum from both ends of the tubular PET heat-transfer film bag until the PET film adheres tightly and effectively to the substrate. The degree of vacuum (negative pressure) should be adjusted appropriately based on factors such as the characteristics of the substrate being transferred and the maximum negative pressure the PET heat-transfer film can withstand—typically ranging between 0.3 and 0.8 MPa.
　　Step 4: Transfer the already wrapped substrate into the oven for baking. The baking temperature and duration should be adjusted appropriately based on factors such as the characteristics of the substrate being transferred, the desired depth of the texture to be printed, and the specific performance of the oven. Typically, the transfer temperature is set between 160°C and 180°C, with a baking time of 5 to 8 minutes.
　　Step 5: Remove the substrate that has already been transferred from the oven, and carefully peel off the PET heat transfer film—either manually or by using a mechanical blowing method (i.e., inflating the tubular PET heat transfer film pouch until it bursts).

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The Process Flow for Wood Grain Transfer Printing on Window and Door Profiles

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