Aneval Inc

Aneval Inc was founded in 1996 to provide technical service to companies and individuals. Charles A. Steele, the founder and president is an industrial scientist with a broad range of expertise from analytical testing to product development. He has been a Laboratory Manager, a Quality Manager, a Formulator and a Researcher. He has authored and coauthored in a variety of fields.

Compostable Colorants for Bio-Plastics

Accepted 2008 SPE RETEC, Detroit MI

Abstract

Efforts made by industry to move toward recyclable and compostable materials require biodegradable colorants. To meet this need, a variety of dyes and pigments were subjected to a standard composting protocol in both their raw form and in Polylactic Acid. From these results a range of compostable colorants is determined.

Use of Dyes in Nylon for Industrial Applications

Accepted 2008 SPE RETEC, Detroit MI

Abstract

Polyamide resins are frequently used in consumer and industrial applications. They are chosen for these applications for a variety of reasons including their durability, chemical resistance and its ability to perform under high-heat working conditions. Therefore the dyes used in these applications must hold up under these extreme conditions. A full pallet of nylon stable dyes was subjected to migration, heat and moisture fastness testing under a variety of conditions for three different Polyamide resin systems. The resulting data is used to determine the suitability of dyes for various applications.

Enhancing Contrast of Fingerprints on Plastic Tape                                                          

Journal of Forensic Science, November 2003, Vol. 48, No. 6

Abstract:

Many of the currently available fingerprinting methods have limited ability to visualize fingerprints on plastic tape without expensive equipment or significant handling of the sample. This is especially true for visualizing fingerprints on black electrical tape. This study sought a hands-off method to produce easy visualization of fingerprints on different types of plastic tape, including black electrical tape, without the need for expensive equipment. The methods selected were to sublime disperse dyes into the tape, both with and without the fuming of cyanoacrylate, everywhere except for where the fingerprint was applied. The resulting color contrasts provided enough differentiation to visualize fingerprints on plastic tape under ambient light. Sequential fuming with cyanoacrylate followed by disperse dyes provided the best visualizations on all tapes, and cyanoacrylate followed by disperse yellow 211 clearly visualized fingerprints on black electrical tape.

Locational Variations as an Obstacle to Single Point Reference Light Fade Studies  

AATCC Review April 2003

Abstract:

This study evaluates the validity of light-fastness predictions based on standardized reference models that rely on a single testing environment. Light-fastness of identical sample sets were evaluated for the same duration of exposure to sunlight in five different locations around the North American Continent.

This study shows that identical samples in different locations fade to differing degrees even when exposed to a consistent duration of irradiance. Furthermore the relative fade rate was inconsistent from one sample type to another. Therefore, an accurate color fastness prediction for a specific colorant must be determined by testing that colorant, under the actual conditions of use, in the intended environment of use. 

Relative Light-Fastness of the Colors Formed From Oxidation Dye Intermediates 

Presented 2002 SCC Technical Showcase, New York, USA

Abstract:

As part of an ongoing study, combinations of oxidation dye intermediates were categorized according to the light-fastness of the color they produced on human hair.

Five sets of virgin blond human hair tresses were dyed with one of six commonly employed primary intermediates in combination with either a secondary or primary intermediate, on a 1:1 M.W. basis. One set of these dyed tresses was retained as a control, with the remaining sets being treated as required to emulate various environmental conditions/states and then subjected to UV light (employing an Atlas SunChex) in order to accelerate their potential for light instability. The environmental states evaluated included the following: dry hair; wet hair; hair wet with perspiration; hair wet with "swimming pool" water. 

After UV exposure, each tress was evaluated both for the direction of the color shift and the decrease in overall color intensity according to the AATCC gray scale. Based on these data, the dye intermediate combinations were grouped according to their potential for light instability.

An Evaluation of Security Marking And Tagging Systems For Polymers and Polymer Products

Presented 2002 SPE RETEC, Toronto, Canada

Abstract:

Product Identity Fraud (PIF) is a general term encompassing Alteration, Counterfeiting and Diversion of raw materials and finished goods. PIF has always existed but in recent years improvements in production technology have caused the magnitude of these crimes to exceed two hundred billion dollars annually. In addition, these crimes have an incalculable impact on long-term brand equity and pose a genuine health and safety risk to people around the world.

One of the ways corporations are trying to secure their products against PIF is to include Security Marking and Security Tagging systems into manufactured goods and raw materials. Often these security systems are incorporated directly into the polymers that comprise the finished product. However, not all approaches are equally beneficial. Inappropriate systems can be expensive and still not provide the desired level of security. Poorly designed or implemented systems can actually increase vulnerability to PIF.

This paper therefore explains differences between marking and tagging systems, establishes the requirements for Durability, Readability and Uniqueness for valid systems and evaluates several systems for their use in securing polymers and polymer systems.

Testing of Hair Dye Products:                                                                                 

Presented 2000 James Robinson Agents Conference, Brampton, UK

Abstract:

The testing of hair dye products is intertwined with the formulating process. Before formulating can even be initiated, preliminary testing must be performed to insure that the materials used are of consistent and sufficient quality. Then during to the formulating process itself, a variety of testing is done to determine the formulation’s compliance with predetermined goals. Finally after a formulation is arrived at it has to be validated and tested for efficacy and stability.

Keystone Quality Hair Dyes Technical Guide and Formulary                                        

Ó 1999, 2003 Keystone Aniline Corporation

Summary:

Written as both an educational manual and a laboratory bench reference, the Keystone Quality Hair Dyes Technical Guide and Formulary presents an overview of the chemistry of hair dye products, technical information on the colorants used, and formulations for dozens of typical and novel products.