What is PR Sculpting?
This is a process with the help of which a website can achieve a high page rank and most of the time it is achieved by using no follow tags to the links pointing outside of the website. Some times also the inner pages of the website are given no follow to save the link juice from evaporating. Matt cutts in his blog have mentioned that this technique is not as effective as web master thinks and PR within a website should be allowed to flow freely because each area of website have content and some time web masters end up doing some thing like PR sculpting in a way which can harm search engine rankings of their websites.