Can I use an umbrella instead of a mass production? hogisim

(1)■ “I want to avoid the sun~” Feat. Rain umbrella
(2)I have ten umbrellas in my house I live alone Every time it suddenly rained, the guys brought from the convenience store needed to take measures before they became an umbrella seller So I decided to always carry an umbrella in my bag
(3)But it doesn’t rain, the umbrella in the bag felt heavier. These days, hot sunlight is pouring in instead of rain. I only get skin diseases while looking for vitamin D It is necessary to protect against very severe ultraviolet rays The umbrella in my bag, which was as big as my luggage, has finally come into use It was nice to open the umbrella and cover the sun
(4)But a friend I met on the street asked me what I was doing, and I said I shouldn’t use an umbrella instead of a parasol. I was scared that the umbrella would not block the sunlight, but rather collect the sunlight and burn my face So I folded the umbrella again, but I wonder if it’s really possible to just use an umbrella instead of Yangsan Let’s do some research
(5)■ I’m curious if I can use an umbrella instead of a parasol
(6)I wonder if using an umbrella instead of mass production will be effective in blocking UV rays, but I’m the only one who’s curious. Fortunately, it wasn’t. There were many people who were curious both at home and abroad

(1)But the answers are different Umbrellas are effective against UV protection
(2)There were mixed opinions from both sides This makes it more confusing

(1)Use an umbrella instead of a mass production. That’s a good reason
(2)On the other hand, the side that didn’t work was the side that gave evidence The umbrella could not block the sunlight because it was not UV-coated The purpose of mass production is to block the sunlight, so it’s UV-coated Korea’s safety quality labeling standards also stipulate that mass production should block UV rays above 85 There is no standard for umbrellas. However, golf umbrellas have a blocking rate of 90 or higher than mass production
(3)■ I can block the sunlight
(4)I’ve been looking for domestic and foreign research for a long time to see if regular umbrellas really have no effect on UV protection, and by the time I give up because I’m tired, I’ve noticed a perfect study
(5)In 2012, researchers at Emery Medical School in the United States tested whether regular umbrellas were effective against UV protection It targeted 23 umbrellas, and all but one travel parasol and one golf umbrella were regular umbrellas The researchers measured ultraviolet radiation from 11 a.m. to noon It was a cloudless day Both UVA and UVB were measured and marked with UVR

(1)UV measurement just below the umbrella

(1)Ultraviolet measurement above the nose

(1)The results of the experiment were unexpected Let’s look at the graph
(2)Close UVR pWcm2 Measurement just below umbrella
(3)Farther UVR pWcm2 Measurement above nose
(4)The X-axis below is the ultraviolet ray measured above the nose and the Y-axis on the left is the ultraviolet ray measured just below the umbrella The numbers shown in the graph are the numbers given to the umbrella. It’s complicated. You don’t have to analyze it. I’ll summarize it The UV protection rate of the 23 umbrellas was 77-99, which is noteworthy here The most ineffective umbrella also blocked the ultraviolet rays of 77. It was a regular white umbrella It’s less effective than UV-coated umbrellas, but much better than not using them
(5)■ Use black rather than white to use an umbrella
(6)It’s better to choose a black umbrella under the same conditions. Fourteen of the umbrellas used in the experiment were black, all of which showed a blocking rate of more than 90 On the other hand, white was not very effective. The umbrella with the lowest blocking rate was also white

(1)Dr. McMichael, a dermatologist who conducted the experiment, said, “The black umbrella
(2)It absorbs more ultraviolet rays and touches the skin less
(3)■ If it’s black, it’s similar with or without UV coating
(4)There have also been studies claiming stronger results This paper was published in 2014 by the Skin Center of Sinakarin Wirott University in Thailand In conclusion, if it’s black, the UV protection effect is similar regardless of whether the umbrella is UV-coated or not
(5)The researchers measured UV protection rates on five black umbrellas The umbrella material was made by the same manufacturer and had the same thickness and durability. The difference was whether or not it was UV coated and the size
(6)This is how the experiment was conducted
(7)an experimental photograph
(8)출처 Vejakupta et al
(9)A total of six mannequins were erected, and five mannequins were equipped with experimental umbrellas I didn’t leave my umbrella for the other one After leaving it outdoors for five days in this state, the blocking rate of each umbrella was calculated based on the exposure of ultraviolet rays of the mannequin without an umbrella We decided to compare the results of three umbrellas of the same size

(1)subject umbrella
(2)Color black size 122 cm Thickness and toughness same
(3)UV coating Inside and Outside No UV coating
(4)출처 Vejakupta et al

(1)As a result, the umbrella coated on the inside has the highest blocking rate at 816
(2)It was shown that the outer coated umbrella was 77 for an umbrella that was not coated at all, and the UV coated umbrella had a higher blocking rate, but the researcher said the difference in these results was not statistically significant
(3)UV protection rate by umbrella
(4)Color Black Thickness Durability Size Same
(5)UV coating Inside UV coating Outside UV coating No UV coating
(6)출처 Vejakupta et al
(7)Compared to the Emery Medical School experiment, the UV protection rate of this experiment is generally low, but it is difficult to directly compare the results because the measurement methods of the two experiments are not the same
(8)■ Don’t stand the sun and use an umbrella
(9)Two studies have shown that an umbrella is quite UV-proof If you’re worried about going out on a sunny day because you couldn’t prepare for mass production, let’s go out with a black umbrella that says there’s one at the front door, of course, mass production would be good, but let’s use an umbrella when we’re in a hurry I hate black. Design is important! If you’re doing it, you can prepare a bright UV-coated parasol or umbrella

(1)Elnice 2023-07-28 103930 17470
(2)Best 1
(3)If the umbrella doesn’t work, you have to wear clothes or get tanned
(4)It’s better than that. Move
(5)Recommended reply
(6)Essenjamini 2023-07-28 10273978 170
(7)Advantages of Black Umbrella – Display of LCD even under the scorching sun 3 movement
(8)Jjakwang 2023-07-28 1709 2570
(9)Best laugh
(10)Precisely, the top side is black and UV-coated parasitic umbrella has the best cost-effectiveness, even high UV protection rate, it’s better than just white black. If you explain it as a common sense science, the top white absorbs sunlight
(11)Recommendation R reply