Now you know how to make your own patterns ( a tutorial here). But still, they have this peculiar digital look and you would be very pleased to add a little texture to give them more reality. I'm going to show you today 2 very quick ways to age your patterns.
1.First, scan a sheet of paper. Colors are better, a lot of grain is welcome. Cut a square the exact size of your pattern ( here 256x256 pixels). Or half, third if you want to repeat it. I make all my patterns in a restricted array of sizes to be able to mix and match (512x512, 256x512, etc).

2. Apply the filter>offset with (here ) an offset of 128 pixels. A seam will appear in the middle of your picture. Make it invisible with the stamp tool or the healing brush tool to create a seamless pattern. Then you can make the grain more visible with one of the Sharpen filters.
can you see the difference with the precedent picture?
3. Aging with no change of the original picture colors.
Desaturate your picture ( ⌘+shift + U)
Then apply the filter>Other>High Pass. Set the radius so the picture keeps only the grain. Too large of a radius will create a seam. This filter keeps the grain and equalize the picture to a medium gray.

4. copy and paste this texture in a new layer over your pattern ( here my bird pattern). Set the layer in overlay mode in the layer palette. Change the transparency of the layer to your taste, et voila! A bird pattern on paper.

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Here is another solution:
3. Aging and yellowing the picture.
Prepare your paper texture as in (1) and (2). Then using Image>adjustments>curves and Image>adjustments>hue saturation, change your texture to a pale yellow one with a lot of grain.

4.Copy and paste this texture in a new layer
over your pattern ( here my bird pattern). Set the layer in multiply mode in the layer palette. Change the transparency of the layer to your
taste, et voila! A bird pattern on paper, with just enough of yellow to make it look vintage.

Comme d'habitude, j'ai besoin d'aide a la traduction que vous trouverez ici:
Je patine mes textures