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Prototyping Center

Negative Process

Illustrated Negative Prototyping Process

1.Obtain M.G. Chemicals Photofabrication Kit (Cat. No. 416-K) and Exposure Kit (Cat. No. 416-X).

Detailed Instructions

2. Print artwork on Transparency Film (Cat. No. 416-T) using a 600 dpi or higher resolution laser printer.

Detailed Instructions

3a. Clean the board, rinse and dry.

Detailed Instructions

3b. Enter safelight environment and take the resist out of the package. Cut resist with 1cm excess border on all sides.

Detailed Instructions

3c. Remove the soft coating from the resist.

Detailed Instructions

3d. Apply the resist to the board. Fold the resist over for a double sided board. For a single sided board, simply fold 1" of the resist over the edge.

Detailed Instructions

3e. Feed the board with resist through the laminator. Store board in dark and dust free environment.

Detailed Instructions

	Exposure Lamp (from 416-X Kit) Artwork on transperency Presensitized copper clad board
4a. Place artwork on board.
Detailed Instructions

	Exposure Lamp (from 416-X Kit) Acrylic weight (from 416-X Kit) Presensitized copper clad board
4b. Secure artwork with the acrylic weight provided.
Detailed Instructions

	Exposure Lamp (from 416-X Kit) Acrylic, artwork and board
4c. Expose board for 12 minutes.
Detailed Instructions

	Tap water (10 parts) Negative Developer (1 part)
5. Dilute the developer 1:10 with water. Remove protective coating from the board.
Detailed Instructions

6. Put on rubber gloves. Peel protective covering and place your exposed board in the diluted developer solution. Brush lightly with smoother brush until exposed resist is removed. (1 - 2 min)

Detailed Instructions

7. Rinse board in water. Dispose of the residue solution properly.

Detailed Instructions

8. Place board in Ferric Chloride until the unprotected copper is removed and your artwork becomes visible on the board. (10 - 15 min). You may use the Professional or Economy Etching Kit.

Detailed Instructions

9. Rinse board in water to finish your board. Dispose of the residue etchant according to your local regulations.

Detailed Instructions

MSDS Listing
Material Safety Data Sheets

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