Trilobite Prep

Viewing 7 posts - 1 through 7 (of 7 total)
  • Author
    Posts
  • #60285
    Sadie Mills
    Keymaster

    We had a question from @carl-lewis on our YouTube account: what are the best chemicals to use to prepare trilobites in limestone?

    @jkallmeyer any ideas?

    #60286
    Jack Kallmeyer
    Moderator

    @sadie-mills @carl-lewis  A lot depends on the preservation material for the trilobite.  Most will be calcitic and will be adversely affected by any chemical cleaner that will dissolve limestone.    To remove loose or soft shale or mud a toothbrush with water and an optional mild detergent will help.  If the limestone matrix is covering part of the trilobite there is no free lunch . . . air scribes and air abrasive cleaning by an expert preparator are required.  Inexperienced use of these tools can ruin a fossil in the blink of an eye.

    #64611
    Sam Ocon
    Participant

    What air scribe would you recommend for home use, @JKallmeyer?

    #64623
    Jack Kallmeyer
    Moderator

    @samantha-ocon  I am sorry I can’t offer any help along those lines.  I don’t use this type of equipment as it isn’t generally needed for most fossils around here.  “hard core” people who do lots of this type of work are the ones who use these.  If you do get one of these remember that you still need a strong suction device pulling away the material so you don’t breath the fines.  These fines can cause lung damage even many years in the future.

    Jack

    #64624
    Jack Kallmeyer
    Moderator

    @samantha-ocon I could check to see what they use in the Cincinnati Museum prep labs.  Maybe that will help.  I am laid up with a foot injury so I’ll have to get one of my friends to check.

    Jack

    #64644
    Jack Kallmeyer
    Moderator

    @samantha-ocon , @sadie-mills  I have an answer for you.  I got the following information from one of the prep lab people who actually use these tools:

    The normal tool we use is Chicago Pneumatic scribe which comes in any number of sizes depending on what you want to use it for.  Paleo Tools has a wide selection of the Chicago and also services them.  We have a coarse one for removing bulk matrix and a finer tipped one for finer work.  Invertebrate paleo has some new tools that they call “German” which are Universal Tool air scribes UT8617.  I was told they were around $900 apiece but online I see them listed for around $255.  The Chicago runs around the same.

    I hope this helps

    Jack

    #64840
    Sadie Mills
    Keymaster

    Thank you, @jkallmeyer, for investigating this! Hope your foot improves!

Viewing 7 posts - 1 through 7 (of 7 total)

You must be logged in to reply to this topic.