1 Feels thick and substantial in your hands, and is the best type of uncoated paper stock available for full-color printing. 2  Standard uses: we exclusively offer 70# Lustre for stationery, envelopes, and newsletters.
If increased effort is needed to fill the lungs, supraclavicular and infraclavicular retraction may be seen. In infants, sternal retraction occurs with only a slight increase in respiratory effort, the result of the pliability of their chests. Compare intercostal bulging.
1 Protraction and Retraction refer to an anterior (protraction) or posterior (retraction) movement, such as of the arm at the shoulders, although these terms have been criticised as non-specific. 2  Reciprocal motion refers to alternating motions in opposing directions.