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.
Forcible retraction can result in tearing, scarring and infection, with the result that circumcision may become medically necessary because of the consequent damage. A boy will retract his foreskin when he is ready to do so, and it is normal for this to happen any time between the ages of 3 and mid-teens.