Not being a chemist, (degrees in Physics and Mathematics), I worry about
chemical etching,
dissolving and changing some of the colors in some of the shells. UV
light destroys yellows
and I'd be concerned with solvents. Like it has been stated before,
test on broken parts that
are not important.
I've had giant fluted clams sitting on a shelf that lost the light
yellow hue in exposed flutes by sunlight.
Some chemicals like the hydrocarbon solvents might dissolve or alter
pigment.
Martin
On 10/2/2016 5:18 PM, Orepaul87 wrote:
> Mineral oil washes off, competent chemists should be able to discern the protectant during analysis just have to think about it more.
>
> Sent from my iPhone
>
>> On Oct 2, 2016, at 11:22 AM, [log in to unmask] wrote:
>>
>> Now it comes out; after I've oiled most of my shells with mineral oil, (but not recently). A few I even sprayed with silicone after a discussion on Conch-L. I was hoping to save periostracum and ligament.
>>
>> I guess my collection will not be suitable for any analysis.
>>
>>
>>
>> ---- Susan Hewitt and/or Ed Subitzky <[log in to unmask]> wrote:
>>
>> =============
>> I am glad that someone pointed out that if you may ever want some of your shells to go into a museum collection, where they can help science for possibly hundreds of years, it is better not to do anything to them in terms of applying any chemicals, except, in the case of marine species, to wash them well/soak them in freshwater to get the salt out.
>>
>> Susan
>>
>>
>>> On Sep 29, 2016, at 5:23 PM, [log in to unmask] wrote:
>>>
>>> Maybe I am in the minority, however, I no longer apply anything to my
>>> shells. If they are a bit dull, such is life. If I have a specimen where I
>>> worry that the periostracum might peel off or the shell may shatter, I
>>> place them in a 4 or 6 mil ziplock bag. While the bags are not totally
>>> impervious, the internal humidity equilibrates so slowly that the shells
>>> that I have stored this way have not shown any appreciable changes in over
>>> a decade. On the other hand, some stored in trays, and exposed to
>>> atmospheric changes, have shown significant changes.
>>>
>>> I no longer have to deal with fumes, shells that are too tacky, etc.
>>>
>>> The additional benefit, as pointed out by Paul, is that if someone wants
>>> to do an analysis of the shell, it has not been adulterated. As most of my
>>> collection is earmarked (in my will) to the Carnegie Museum, this is an
>>> important consideration to me.
>>>
>>>
>>>> Hello,
>>>> I saw some silicone âbeauty serumâ, if I remember the name well, at
>>>> the last paris Shell show.
>>>> Would somebody know whether silicone is better than paraffin/mineral oil
>>>> to enhance colors of seashells and why?
>>>>
>>>> Thanks in advance,
>>>> Franck Frydman
>>>>
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>>>
>>> Regards,
>>> Charlie
>>> .................................................
>>> Charlie Sturm
>>>
>>> Treasurer
>>> American Malacological Society
>>>
>>> Research Associate - Section of Mollusks
>>> Carnegie Museum of Natural History
>>> Pittsburgh, PA, USA
>>>
>>> Associate Professor - Family Medicine
>>> Fellow-American Academy of Family Practice
>>> Fellow-Academy of Wilderness Medicine
>>>
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