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Performance Evaluation of Philippine Tropical Fabrics as DOST Office Uniform

Author: Marites S. de Leon

Abstract

The Performance of the Philippine Tropical Fabrics (PTFs) as office uniforms was evaluated through actual wear test. The survey was participated in by 836 respondents comprising of 552 female and 284 male employees from the Department of Science and Technology (DOST) central office and its 22 agencies including regional offices. Four sets of polyester/pineapple blouses (beige, mustard, pink and blue) for female and one set each of polyester/abaca (beige) and polyester/pineapple (blue) barongs for female were evaluated. A survey questionnaire from was used to record the respondents' observations on the different properties that contribute to the acceptability and varying preferences.

Results show that the fabrics have acceptable weight, strength and softness for uniforms and are easy to care and maintain. Other properties, however, such as comfort, itchiness and colorfastness need to be improved to make the fabrics highly acceptable.
 
Among the uniforms, the blue for female and beige for male were found the most acceptable by the majority of the respondents. The ranking of the uniforms according to respondents' preferences can be expressed as follows: for female: blue > mustard > pink > beige; for female: beige > blue.
 
 

Extraction and Characterization of Achuete (Bixa orellana) Dye Powder and its Application to cotton and Silk

Author: Julius L. Leano Jr.

Abstract

Dyes from achuete seeds were extracted using ethanol at different liquor ratios (LR) and agitation time. The powders obtained were oven-dried at 60 degree celcius and were characterized using UV-Vis spectrophotometry and FT-IR spectroscopy. The ^max of the aqueous alkaline dye solution is 451nm and is stable to prolonged heating. The FT-IR spectrum suggests the presence of bixin and norbixin pigments in the powder. Adsorption curves (isotherms) reveal rapid dye absorption during the first 30 minutes and slows down after 60 minutes for all the mordanted fabrics. Different concentrations of the aqueous alkaline dye powder solution were applied to alum and copper sulfate mordanted cotton and silk materials under varied dyeing time. Color yield was found dependent on the mordant used where as the colorfastness (CF) to laundering was not affected by the dyeing time. CF to Laundering rating is 3.5 for cotton and 4.0 for silk.

 

Effect Of Preservation and Incubation Methods on the Hatching Percentage of F1 Hybrid Silkworm Eggs

Authors: Sweet Gerrylou R. Mojica , Serenita S. Ompoy and Zita L. Sanchez

Abstract

The study was conducted to evaluate the effect of different preservation and incubation methods for different F1 hybrid silkworm eggs based on hatching percentage.

Four (4) Mindanao F1 silkworm hybrids were utilized namely: PTRI SW-101 , PTRI SW-102, PTRI SW-103 and PTRI SW-104. The eggs were subjected to 0, 3, 6, and 9 months preservation and 1 or 2 two days black boxing durations.
 
Results showed that the hatchability of F1 silkworm eggs were significantly higher with long-term preservation method compared with the eggs subjected to 0-month preservation. Hatching percentages were also observed to be higher at incubation with 2-days black-boxing compared with eggs black-boxed foe only 1 day. For all the four Mindanao hybrids used, the effect of long-term preservation method and 2-days black-boxing during incubation effected the same results, thus the response of the four hybrids were uniform. This study recommends that F1 silkworm eggs should be preserved under long term-preservation and should be black-boxed for 2 days during incubation to ensure high hatching ratio.
 
 

PTRI Intervention on the Natural Dyeing Practices of the Higaonon Hinabol Weavers of Mintapod, Impasug-ong, Bukidnon

Author: Julius L. Leano Jr.

Abstract

The traditional dyeing practices on the hinabol of the Higaonon weavers in Impasug-ong, Bukidnon was assessed to suit the proposed intervention, The evaluation revealed the low productivity and lack of systematic dyeing procedure which often compromised the quality of the dyed materials. PTRI introduced a technology, which sought to instill a more systematic, standard and scientific approach in dyeing abaca fibers. Fiber pre-treatment using hydrogen peroxide, alkali and sodium silicate was introduced to clean and render a whiter appearance of the fibers prior to dyeing. Some of the local dye sources used include tungog (roots of Morinda citrifolia) yellow ginger (rhizomes of Curcuma longga), and the native lila (vine) and ilalama (wood). The use of Sibukao (wood of Ceasalpinnia sappan) was also intoduced as a dyeing option to obtain the much desired red color while Talisay (leaves of Terminalia catappa) was used to produce the desired black color. Standardizing techniques of the local dye sources were likewise pursued.

The assimilation of the PRTI technology in natural dyeing was found to have increased the over all quality, and productivity and likewise improved the aesthetic appeal of the hinabol. These findings ascertained the successful intervention of PTRI in sharing the systematic process of natural dyeing in the Higaonon weavers.
 
 

Quality of Lint Properties of Seven Locally Grown Cotton Varieties

Authors: Dr. Caridad M. Cuchon , Jovita A. Hayin and Julita H. Pedrugao

Abstract

Seven varieties of locally grown cotton namely CRDI-1 from Sarangani, Ilocos Sur and South Cotabato, CRDI-2 from Pangasinan and Ilocos Sur, UPL-C2 from Ilocos Norte and Sur, (PSB-Ct8, PSB-Ct3, Navkar F1 and Navkar F2) all from Ilocos Norte , submitted by the Cotton Development Authority (CODA) were evaluated as to their acceptability in yarn production. 

The study focused on six cotton fiber properties namely, staple length, breaking tenacity, fiber fineness, maturity, sugar and non-lint content.
 
With the Indian standards as basis, results showed that CRDI-2 of Alacan, Pangasinan and San Juan, Ilocos Sur, is the most promising variety. Based on its exhibited CSP volume, it can be processed to 30 Ne yarn count and higher.
 
 

Tamarindus indica Seed Gum as a Natural Coagulant for Textile Dye Effluents

Author: Jenice O. Pagkalinawan

Abstract

Tamarindus indica seed gum was evaluated and explored  for its coagulation ability to remove color from actual textile dye effluents and synthetic  dye solutions. Five types of commercial dyes namely reactive yellow, acid red,direct blue,disperse red and basic  blue were selected for this study. Variations of the volume of gum solution were conducted for optimum results. Tamarind seed gum was found to be a potential natural coagulant for the decolorization of textile dye effluents especially for basic and direct dyes, but not for acid, disperse and reactive dye solutions.


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