Difference between sunscreen and sunblock

Posted By: Sm Adminon: February 12, 2016In: Health and Beauty

Sunscreen:
Sunscreen is the lotion which protects the skin from sun’s harmful rays. It helps to reduce sunburn and sun damage. Sunscreen penetrates the sun’s rays to the skin but filter some of the radiation in the ultra violet spectrum.
Sunblock:
Sunblock is the lotion which reflects the UVA sand UVB rays. It should be reapplied every two hours. There is no sun block which can fully reflect the UV rays. Sunblock prevents the Sun’s rays from reaching skin by reflecting them away or absorbing them, changing their structure and releasing them.
Differences:

Basis	Sunscreen	Sunblock
Definition (www.oxforddictionaries.com)	An active ingredient of creams and lotions intended to protect skin from the sun	A cream or lotion for protecting the skin from the sun and preventing sunburn.
Synonyms	Sun cream, face cream, suntan lotion, ointment, lanolin	Sun blocker
Types	Its types are: Gel sunscreen Cream sunscreen Sunscreen lotions Sunscreen wipe Spray sunscreen Colored sunscreen Powder sunscreen	Its types are: Physical sunblock Chemical sunblock
History	Early synthetic sunscreens were first used in 1928, and the first major commercial product was brought to market in 1936, introduced by the founder of L’Oreal, French chemist Eugène Schueller.	The first commercial sunblock was invented in 1936.
Word origin	The word sunscreen was originated in between 1730-40.	The word sunblock was originated in between 1975-80.
Product	Liquid form	Creamier form
Prevents	It prevents from UV radiations and reduces the amount of radiation that reaches skin.	It prevents from UV radiations and it completely blocks the radiation from reaching the skin.
When applied	Transparent and invisible when applied	Thicker and remain visible
Main ingredients	Aminobezoic Acid Avobenzone Benzophenone Cinoxate Dioxybenzone Ensulizole Homosalate Meradimate Octisalate Octinoxate Octocrylene Oxybenzone PABA Sulisobenzone Trolamine Salicylate	Titanium dioxide Zinc oxide Iron oxide
Must be applied	30 minutes before going out in the sun.	Effective as soon as it is applied, so that it can be applied immediately before sun exposure.
Pronunciation	Eng (UK): /ˈsʌnskriːn/ Eng (US): /ˈsənˌskrēn/	Eng (UK): /ˈsʌnblɒk/ Eng (US): /ˈsənˌbläk/
Advantages/Benefits	Its advantages are: Shield from harmful UV rays Prevents premature aging Lowers cancer risks Lowers blotchiness on face Prevents sunburns Prevents tanning Enhance health of the skin	Its advantages are: Prevents premature aging Prevents skin cancer
Disadvantages	Its disadvantages are: Blocks vitamin D Chemicals Leaves white streaks Reapply more often	Its disadvantages are: Thick, opaque consistency Greasy and clog the pores
Example in Sentence	I always apply sunscreen before going outdoors. You should wear a sunscreen.	I use sunblock to prevent from sun damage. The sun is high so I put on some sunscreen.