Christiane,
Pinterest has a good solution for this that I just implemented on an image on my own site. It requires adding a tiny bit of HTML code to your image tag:
nopin="nopin"
So say for instance you have an image in a post. You would go into the ‘Text’ view for that post, find the <img src="/imagelocation" ... /> code, and insert the code I provided above into that. The resulting code should look like this: <img class=" size-thumbnail wp-image-134 alignnone" src="/imagelocation" alt="Alt Tag" width="150" height="150" nopin="nopin" />
Hope this helps!
