Impact of Natural Dyes Cochineal (Dactylopius coccus) and airampo (Opuntia soehrensii) on the Physico-Mechanical Properties and Colorfastness of Alpaca (Vicugna pacos) Yarns

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dc.contributor.authorQuispe-Quispe, Arturo
dc.contributor.authorLozano, Franklin
dc.contributor.authorPérez Falcón, Luis Fernando
dc.contributor.authorVilcanqui Pérez, Fulgencio
dc.contributor.authorChaquilla Quilca, Guadalupe
dc.contributor.authorSarmiento Casavilca, Víctor Hugo
dc.contributor.authorFernández Ayma, Alfredo
dc.contributor.authorNuñez Fernandez, Anderson
dc.contributor.authorAllca Salas, Shirly Coraima
dc.date.accessioned2026-03-12T14:38:04Z
dc.date.available2026-03-12T14:38:04Z
dc.date.issued2026-03-12
dc.description.abstractThe effect of dyeing with natural colorants on the physico-mechanical properties, colorimetric parameters, hydrophobicity, and color fastness of alpaca threads (Vicugna pacos) was investigated. Two dyes from the Andes were evaluated: cochineal (Dactylopius coccus) and airampo (Opuntia soehrensii), using a post-mordanting method with sodium sulfate (Na2SO4), oxalic acid (C2H2O4), and potassium alum (KAl(SO4)2·12 H2O). The analysis of the results showed that the dyeing treatments did not significantly affect the elongation (51–65%), maximum strength (1.64–1.94 N), or tenacity (0.93–1.10 MPa) of the threads. Regarding colorimetry, cochineal produced intense red shades (a* = 34.95) and the highest saturation (C*) of up to 40.29. Meanwhile, airampo generated warm, bright yellow tones (L*) up to 70.19. A critical finding was the low wash fastness, with ratings of 1 to 2 on the grayscale. However, the rub fastness ranged from moderate to good (2 to 4–5). Dyeing with pure cochineal increased the hydrophobicity of the thread, reaching a contact angle of 97.22°. These results indicate that, although the dyes offer a rich color range without compromising the fiber, it is essential to optimize the process to improve color fixation before commercialization.
dc.description.sponsorshipVicerrectorado de Investigación de la Universidad Nacional Micaela Bastidas de Apurímac (VRIN-UNAMBA), No 011-2024 (2)-CU-UNAMBA
dc.identifier.doihttps://doi.org/10.1080/15440478.2025.2597338
dc.identifier.urihttps://hdl.handle.net/20.500.14195/1486
dc.language.isoeng
dc.publisherJournal of Natural Fibers of Taylor & Francis
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectVicugna pacos
dc.subjectSustainable dyeing
dc.subjectCochineal
dc.subjectAirampo
dc.subjectColor fastness
dc.subjectMechanical properties
dc.subject.ocdehttps://purl.org/pe-repo/ocde/ford#2.11.00
dc.titleImpact of Natural Dyes Cochineal (Dactylopius coccus) and airampo (Opuntia soehrensii) on the Physico-Mechanical Properties and Colorfastness of Alpaca (Vicugna pacos) Yarns
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion

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