Ammonium chloride is a quite useful method. It’s basically a powder that settles onto the surface. It was used in the past to show flaking patterns on projectile points made of materials such as obsidian or quartz that don’t show flake scarring. It’s basically a DIY method. The powder is water soluble and leaves no residue.
Lyle Browning, RPA
> On Feb 8, 2018, at 11:40 AM, Timothy Scarlett <[log in to unmask]> wrote:
>
> Shane,
> If you can find access, a 3D scanner might allow you to get an model around which you can move the artificial light so it “rakes” from different directions. That might help, depending upon the depth of the scratches.
>
> While I don’t recommend chalking stone artifacts, Jamestown did this:
> https://www.nasa.gov/topics/nasalife/features/jamestown-slate.html <https://www.nasa.gov/topics/nasalife/features/jamestown-slate.html>
> The detail photo is amazing:
> https://www.nasa.gov/images/content/360262main_slate-hi.jpg <https://www.nasa.gov/images/content/360262main_slate-hi.jpg>
>
> They do not explain how they did this, but it looks like they dusted the slate with powder and then gently blew off the extra chalk. Doing this is leaves residue in the scratch grooves, but you may not have any other option. You could contact Jamestown’s conservators about this example.
>
> I have also used a simple technique of putting the slate (or whatever) on a flatbed scanner and scanning a high res image. Then in photoshop, playing with the saturation, exposure, and other settings sometimes help with results.
>
> Cheers,
> Tim
>
>
>
>> On Feb 8, 2018, at 4:00 AM, Shane Burke <[log in to unmask]> wrote:
>>
>> Hello all,
>>
>> Has anyone discovered or know of methods allowing one to see writing on
>> writing slate? A UV light is producing some results, but any advice on
>> other techniques would be appreciated.
>>
>> Thanks
>>
>> Shane Burke
>>
>> --
>> Dr Shane Burke
>> Senior Lecturer
>> School of Arts & Sciences
>> The University of Notre Dame Australia
>> Fremantle Campus
>> Cliff Street, Fremantle, Western Australia
>> (PO Box 1225, Fremantle, 6959)
>> Phone: 9433 0176 (w) 0429 832 541 (m)
>> Email: [log in to unmask]
>> Internet: www.nd.edu.au
>>
>>
>> IMPORTANT: This e-mail and any attachments may be confidential. If you are
>> not the intended recipient you should not disclose, copy, disseminate or
>> otherwise use the information contained in it. If you have received this
>> e-mail in error, please notify us immediately by return e-mail and delete
>> or destroy the document. Confidential and legal privilege are not waived or
>> lost by reason of mistaken delivery to you. The University of Notre Dame
>> Australia is not responsible for any changes made to a document other than
>> those made by the University. Before opening or using attachments please
>> check them for viruses and defects. Our liability is limited to
>> re-supplying any affected attachments.
>>
>> ############################
>>
>> To unsubscribe from the HISTARCH list:
>> write to: mailto:[log in to unmask]
>> or click the following link:
>> http://community.lsoft.com/scripts/wa-LSOFTDONATIONS.exe?SUBED1=HISTARCH&A=1
>
>
> ############################
>
> To unsubscribe from the HISTARCH list:
> write to: mailto:[log in to unmask]
> or click the following link:
> http://community.lsoft.com/scripts/wa-LSOFTDONATIONS.exe?SUBED1=HISTARCH&A=1
############################
To unsubscribe from the HISTARCH list:
write to: mailto:[log in to unmask]
or click the following link:
http://community.lsoft.com/scripts/wa-LSOFTDONATIONS.exe?SUBED1=HISTARCH&A=1
|