January 2013 in “프로그램북(구 초록집)” Hair perms or treatments seem safe to use up to 3 to 4 times during pregnancy.
February 2022 in “Cosmetic Dermatology” Permanent hair waving uses chemicals to create long-lasting curls.
October 2012 in “한국미용학회지” For best curls and hair health, use keratin and ceramide after rinsing, or skip rinsing for stable curls.
January 2011 in “Journal of Society of Cosmetic Chemists of Japan” 18-MEA and SPDA can restore damaged hair's smoothness and reduce frizz.
September 2025 in “Journal of Surfactants and Detergents” Shampoos with sodium lauroyl methylaminopropionate improve hair lubrication and reduce irritation.
May 2026 in “Waste and Biomass Valorization” April 2026 in “Industrial & Engineering Chemistry Research” The new method speeds up leather unhairing and improves quality.
September 2017 in “Journal of Investigative Dermatology” Hair care products used for 4 weeks made hair smoother.
April 2025 in “BMC Chemistry” Thiadiazole chitosan conjugates improve hair manageability, moisture, and protection in conditioners.
2 citations
,
February 2022 in “BMJ” Emollients can make fabrics more flammable, so take safety precautions.
12 citations
,
March 2023 in “Processes” Plant surfactants from quinoa and soybeans are effective, safe, and eco-friendly for shampoos.
19 citations
,
April 2021 in “Journal of Cosmetic Dermatology” The treatment with silk proteins and linseed polysaccharides effectively protects and repairs chemically damaged hair.
11 citations
,
April 2022 in “Biophysical Journal” Disulfide bonds in keratin fibers break more easily under stress, especially when wet, affecting fiber strength.
3 citations
,
January 1985 in “Drug development and industrial pharmacy” Additives like ethanol and propylene glycol increase the release of zinc pyrithione from shampoo.
12 citations
,
October 1954 in “Textile Research Journal” Hair absorbs alkali bromide salts and water, affecting its structure, with absorption decreasing at higher temperatures.
September 2025 in “International Journal of Cosmetic Science” Friction causes hair breakage during combing, and fragment count predicts hair strength.
Moisture makes hair flexible for reshaping during blowouts.
1 citations
,
January 2004 in “China Surfactant Detergent & Cosmetics” The compound improves hair conditioning in shampoos.
October 2025 in “International Journal of Cosmetic Science” Conditioners improve hair manageability but don't repair damage.
2 citations
,
December 2015 in “International Journal of Dermatology” Washing test helps identify hair loss type, low iron levels significant.
3 citations
,
August 1980 in “Acs Symposium Series” Hair increases in size when it absorbs water, and treatments like bleaching affect how much water it can take in.
37 citations
,
October 2015 in “PeerJ” Perming significantly changes hair's molecular structure, while shampoo and conditioner do not.
1 citations
,
January 2010 The washing machine cylinder can crack at 15 kg and 2400 rpm, which is higher than normal use.
March 2026 in “Journal of the mechanical behavior of biomedical materials/Journal of mechanical behavior of biomedical materials” Bleaching and UV exposure significantly damage hair.
Treating hair with 1M sodium hydroxide increases its friction, making it better for small medical knots.
25 citations
,
May 2020 in “Progress in Organic Coatings” Castor oil-based polyurethanes are promising for making safe, strong-performing, eco-friendly hair-styling products.
December 2000 in “Kirk-Othmer Encyclopedia of Chemical Technology” Hair care products are regulated, with shampoos, conditioners, dyes, and styling products designed for cleaning, enhancing, and maintaining hair.
1 citations
,
January 2006 High temperatures and cosmetic processes can damage hair keratin, affecting its structure and strength.
March 2009 in “CRC Press eBooks” Hair conditioner makes wet hair easier to comb by reducing friction.
69 citations
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January 2009 in “Advances in Materials Science and Engineering” Wool keratin is reactive, biocompatible, biodegradable, and can model keratin from other sources.